Jenny is preparing a presentation about volume for her science class. She writes down the following notes about volume:
–Volume is constant for solids since they have a shape.
–Volume varies for liquids and gases since they do not have a shape.
–Volume may be measured in many ways.
–Common units of volume include cubic centimeters, milliliters, and liters.
When giving her presentation, Jenny notices there is a mistake in her notes. Which is the mistake in her notes?
Solids do not necessarily have a shape.
The volume for liquids is constant.
Volume is always measured using a graduated cylinder.
Common units for volume also include cubic grams.
Answers
Answer:
b
Explanation:
Related Questions
microbe topic: Influenza Virus, Strain H1N1 (Swine Flu)
You must find a news article on your chosen microbe published in the last 12 months in a main stream, media-outlet based, mass-distributed news source where the general public (even Grandma or Aunt Sally) gets their daily news. This news article will be your main reference. You must read for understanding, then tell us about the news report in your discussion. You must write a review of the news article contents, discuss what type of microorganism it is, and if the organism is in nature or is used in industry or research or causes disease. If it causes disease you must discuss transmission, increasing incidence, factors contributing to the spread of the organism, lab culturing, etc. You may use government-based or other scholarly references only as secondary information, to explain details missing from your news article above, such as, what kind of organism it is, the gram reaction, how the organism affects us, or follow -up information not known at the time of the news release but has been provided since that time .
Your discussion should be well-written, in your own words, paraphrasing from only credible academic sources. You may not directly quote from your sources; minimum elaboration on the topic of a minimum of 300 words and maximum of 400 words.
Answers
The article that I am going to review discusses the influenza virus and its new outbreak in China. The article is published on the official website of BBC News, one of the mainstream media outlets.
The article that I am going to review discusses the influenza virus and its new outbreak in China. The article is published on the official website of BBC News, one of the mainstream media outlets. The article was published on the 1st of December 2020 and is titled "China reports first case of H1N3 bird flu virus in human". The article provides the necessary information regarding the new strain of influenza virus and the precautions that people need to take. Type of microorganism and its nature The H1N1 virus is an influenza A virus that affects humans, pigs, and birds. This microorganism is primarily present in nature, particularly in birds and is also used for research purposes. The virus is present in pigs and can cause respiratory illness in humans. According to the article, a new strain of the H1N1 virus, called H1N3, was identified in China. The virus was transmitted from birds to humans, and only one case has been reported so far, making it less severe. Transmission and causes of the spread The virus is mainly transmitted through respiratory droplets from the infected person and can also spread through contaminated surfaces. This can happen when a person comes into contact with an infected surface and then touches their face, mouth, or eyes. The risk of transmission is higher in crowded places, which can contribute to the spread of the virus. The article highlights the importance of taking precautionary measures such as wearing a mask, maintaining social distancing, and washing hands frequently.Lab culturingThe article does not provide any information about the lab culturing of the virus. However, the scientific community has been working on developing a vaccine for the H1N1 virus. This research is conducted in specialized laboratories that can handle such dangerous pathogens.ConclusionIn conclusion, the article provides essential information about the new outbreak of the H1N3 virus in China. The article explains the nature of the microorganism and how it is transmitted from one person to another. The article also highlights the importance of taking precautionary measures and provides the necessary information for people to protect themselves from the virus. The article lacks information on lab culturing of the virus. However, it is clear that the scientific community is actively working on developing a vaccine to fight this virus.
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What does it mean when an experiment has a set of events that are collectively exhaustive?
Answers
A Final statement or concluding statement
If the union of a set of events equals the sample space, the set of events is said to be collectively exhaustive. This indicates that every outcome of the random experiment is represented by the current set of events.
Examples of Exhaustive events are:-Experiment: - A die is rolled and following observation is obtained.
Sample space :- ( 1, 2, 3, 4, 5, 6)
E1:- getting a multiple of 2 number
E2:- not getting a multiple of 2
E1 and E2 are two exhaustive events
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Use your knowledge of science to answer the questionSelect the three correct answers
Answers
They give us the following statements
A) Glucose is broken down into carbon dioxide and water.
This statement would be correct if we are talking about cell respiration because glucose and oxygen produce carbon dioxide, water, and energy in that reaction.
B) Energy is stored in the bonds of ATP.
What happens when two continental plates collide?
[SCIENCE]
Answers
Answer:
When two continental plates collied (on land) a mountain range can be created.
When oxygen is present, glycolysis is followed by
A. lactic acid fermentation
B. alcoholic fermentation
C. photosynthesis
D. the Krebs cycle
Answers
Answer: D. The Krebs cycle
Explanation:
If oxygen is available, glycolysis is followed by two processes in the mitochondria -- the Krebs cycle and oxidative phosphorylation, respectively -- that further increase ATP yield.
When oxygen is present, glycolysis is followed by
Answer:
D. the Krebs cycle
if you had 2 sequences, one is 10 bp long and the other 20 bp long, how many alignments are possible if gaps are not allowed?
Answers
If you had 2 sequences, one is 10 bp long and the other 20 bp long, then there are 11 alignments possible if gaps are not allowed.
When we are trying to align two sequences, we are looking for positions where the nucleotides match or mismatch. The number of possible alignments between two sequences depends on the length of the sequences and the degree of similarity between them.
To calculate the number of possible alignments between two sequences without gaps, we can use the formula:
number of alignments = (length of longer sequence - length of shorter sequence) + 1
In this case, the longer sequence is 20 bp and the shorter sequence is 10 bp.
So,
number of alignments = (20 - 10) + 1 = 11
Therefore, there are 11 possible alignments between the two sequences if gaps are not allowed.
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Which of the following statements concerning chromosomes is/are true? Select all that apply.
selectk All That Apply
Chromosomes are composed of DNA and packaging proteins called histones so they may fit tightly into the nucleus of a cell.Chromosomes are composed of DNA and packaging proteins called histones so they may fit tightly into the nucleus of a cell.
Located on each chromosome are segments of DNA known as genes or units of inheritance that code for functional products.Located on each chromosome are segments of DNA known as genes or units of inheritance that code for functional products.
Homologous chromosomes contain the same genes and the same allele combination.Homologous chromosomes contain the same genes and the same allele combination.
DNA replication occurs prior to the cell cycle, in which copies of each homologous chromosomes are made and each of these copies are called sister chromatids.DNA replication occurs prior to the cell cycle, in which copies of each homologous chromosomes are made and each of these copies are called sister chromatids.
After replication, sister chromatids, which are identical copies of a chromosome, contain identical allele combinations.After replication, sister chromatids, which are identical copies of a chromosome, contain identical allele combinations.
The ultimate purpose of sexual reproduction and replicating chromosomes is to pass on a copy of a cell’s genes to the next generation of cells within the body.The ultimate purpose of sexual reproduction and replicating chromosomes is to pass on a copy of a cell’s genes to the next generation of cells within the body.
Answers
The true statements concerning chromosomes are:
1. Chromosomes are composed of DNA and packaging proteins called histones so they may fit tightly into the nucleus of a cell.
2. Located on each chromosome are segments of DNA known as genes or units of inheritance that code for functional products.
3. Homologous chromosomes contain the same genes and the same allele combination.
4. DNA replication occurs prior to the cell cycle, in which copies of each homologous chromosomes are made, and each of these copies is called sister chromatids.
5. After replication, sister chromatids, which are identical copies of a chromosome, contain identical allele combinations.
6. The ultimate purpose of sexual reproduction and replicating chromosomes is to pass on a copy of a cell's genes to the next generation of cells within the body.
1. Chromosomes are composed of DNA and histones, which are proteins that help in packaging the DNA. This packaging allows the long DNA molecule to fit tightly into the nucleus of a cell.
2. Genes are located on chromosomes. They are segments of DNA that contain instructions for building functional products like proteins. These genes serve as the units of inheritance, carrying genetic information from one generation to the next.
3. Homologous chromosomes refer to the two copies of each chromosome in a diploid cell. While they contain the same genes, they may have different alleles, or versions of those genes, which contribute to genetic variation.
4. DNA replication occurs before the cell cycle. During replication, each chromosome's DNA is copied, resulting in two identical sister chromatids attached at a central region called the centromere. This ensures that each daughter cell receives a complete set of chromosomes during cell division.
5. Sister chromatids are exact copies of each other because they are formed through DNA replication. They contain identical allele combinations since they originated from the same chromosome.
6. The purpose of sexual reproduction and the replication of chromosomes is to pass on a copy of the cell's genes to the next generation of cells within the body. This ensures the transmission of genetic information, allowing for the development of new individuals with unique combinations of genes.
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(1)
A student set up a model to represent the digestion and absorption of food molecules in the
digestive system.
The diagram shows the
student's model.
Water bath
at 37 °C-
Test tube
This is the method used.
1. Fill a test tube with water
at 37 °C
2. Test the water for starch
and for sugar.
3. Mix together starch and
enzyme solution and immediately test it for starch and for sugar.
4. Fill some partially permeable tubing with the starch and enzyme mixture.
5. Seal the tubing and place it in the test tube of water.
6. Place the test tube in a water bath at 37 °C
Water
Partially permeable tubing
Water in the test tube
Partially permeable
tubing
Starch and enzyme
solution
7. After 30 minutes, test the mixture inside the partially permeable tubing and test the water in
the test tube for starch and for sugar.
(b)
Suggest which parts of the body the partially permeable tubing and the water in the test
tube represent.
Answers
In the above student's model, the partially permeable tubing is one that stands for the small intestine, and this is seen as the site of nutrient absorption in the above the digestive system.
What is the digestion about?The water in the test tube is one that stands for the bloodstream, which is one that carries all of the nutrients away from the small intestine and this is one that is to be used by the body's cells.
Therefore, note that in course of the process of digestion, food is said to be broken down into smaller molecules that are known to be be absorbed by the body hence the small intestine, where the nutrients are said to be absorbed via the walls of the intestine and they do go into the bloodstream.
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7. __________ represent the different variations of a gene. Alleles Traits Chromosomes None of the above
Answers
Alleles represent the different variations of a gene.
The correct option is option a.
An allele is basically defined as an alternative form of a particular gene and an allele is basically one of the members of a pair of the genes which is found to be located at a specific position on a particular chromosome.
They basically happen to determine the distinct traits which can be passed on from one generation to the other generation through the process of sexual reproduction. The allele can be either dominant or it can be a recessive allele.
Hence, the correct option is option a.
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Briefly explain how ATP is formed by oxidative phosphorylation.
Answers
Answer: I hope this is helpful please mark me brainlist if correct then no if wrong. Have a blessed day
Explanation:
In oxidative phosphorylation, chemiosmosis is the mechanism by which the movement of hydrogen ions down their electrochemical gradient, through ATP synthase, is coupled to the phosphorylation of ADP. This reaction forms ATP, the energy-carrying molecule of the cell.During oxidative phosphorylation, electrons derived from NADH and FADH2 combine with O2, and the energy released from these oxidation/ reduction reactions is used to drive the synthesis of ATP from ADP.In eukaryotes, oxidative phosphorylation occurs in mitochondria, while photophosphorylation occurs in chloroplasts to produce ATP.Oxidative phosphorylation uses these molecules and O2 to produce ATP, which is used throughout the cell whenever energy is needed.Oxidative phosphorylation produces 24–28 ATP molecules from the Kreb's cycle from one molecule of glucose converted into pyruvate. Two theoretical approaches applied to the oxidative phosphorylation are metabolic control analysis and nonequilibrium thermodynamics.
1) compare all three states of matter to the
right. Which square has the greatest density
and why? And why is it correct?
Answers
Answer:
A
Explanation:
it has more matter in given area, so it is denser.
Some researchers have suggested that highly painful memories can be repressed. This theory
a) is controversial and the evidence is ambiguous at best.
b) is widely considered by most researchers to be correct.
c) has been disproven and is no longer considered valid by any researcher.
d) is known to be correct due to much undisputed evidence.
Answers
a) is controversial and the evidence is ambiguous at best. The idea of repressed memories is still debated in the field of psychology, and there is no clear consensus among researchers about its validity.
The theory that highly painful memories can be repressed is controversial in the field of psychology and the evidence is not clear-cut. Repression is the act of unconsciously blocking or pushing a distressing memory into the unconscious mind. While some research suggests that individuals can indeed repress traumatic memories as a coping mechanism, others argue that repressed memories can be created or distorted by suggestion or therapeutic techniques. Furthermore, the validity of repressed memories has been disputed in legal settings, with concerns about false memories and the impact on the accused. Overall, the theory of repressed memories remains an active area of research and debate in psychology.
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What form is DNA in during mitosis?
A. protein
B. ribosome
C. chromatin
D. chromosomes
Answers
Answer:
Chromosomes form is DNA in during mitosis.
Explanation:
In the context of the cell cycle, mitosis is the part of the division process in which the DNA of the cell's nucleus is split into two equal sets of chromosomes.
During mitosis, DNA is in the form of chromosomes, which is option D, as the chromosomes are condensed and highly coiled structures made up of DNA and associated proteins called histones.
During mitosis, a cell divides into two daughter cells that are genetically identical to the parent cell. Chromosomes are critical to this process because they carry the genetic information necessary for the formation of the new cells, and before mitosis begins, the chromatin (a complex of DNA and proteins) in the nucleus of the cell condenses into visible chromosomes. This condensation process involves the compaction of chromatin into a more compact and organized structure.
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mimosine is a natural product found in large quantities in the seeds and foliage of some legume plants. what functional groups are present in mimosine?
Answers
The functional groups present in Mimosine are carboxylic acid, ketone, amine, and alcoholic groups.
Mimosine is a natural substance that is abundant in some legume plants' seeds and foliage. It has been demonstrated to cause hair loss and hair growth suppression in mice. Alcohol, ketone, amine, and carboxylic acid make up the chemical known as mimosine. Six carbon atoms with sp2 hybridization and two carbon atoms with sp3 hybridization make up the chemical "mimosine." 24-alpha bonds and 4 pi-bonds make up mimosine.
One of the main effects of the amitotic drug mimosine is to inhibit the development of hair. It has undergone testing to determine whether it might be used to chemically shear sheep. In Indonesia, leucaena seed, which is high in mimosine, is typically only used sparingly in human diets as a curry sambal.
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QUESTION 1 Exercise 11.10. Butterflies. Alice, Bob, and Charlotte are looking for butterflies. They look in three separate parts of a field, so that their probabilities of success do not affect each other. • Alice finds 1 butterfly with probability 17%, and otherwise does not find one • Bob finds 1 butterfly with probability 25%, and otherwise does not find one • Charlotte finds 1 butterfly with probability 45%, and otherwise does not find one Let X be the number of butterflies that they find altogether. Write X as the sum of three indicator random variables, X1, X2, X3 that indicate whether Alice, Bob, Charlotte (respectively) found a butterfly. Then X= X1+X2 +X3. Find the expected value of X by finding the expected value of the sum of the indicator random variables. Your answer will have two decimal places. **This is a straight forward expected value of a sum of random variables, nothing fancy here! QUESTION 2 Exercise 11.16. Flipping coins. Flip a coin until the second head comes up. Let X be the number of flips needed to get the second head. What is the E(X). The first step is to find the expected value of getting the first head. Is this like Example 11.10, sampling without replacement, OR like Example 11.11, sampling with replacement? O A. Example 11.10, sampling without replacement O B. Example 11.11, sampling with replacement QUESTION 3 Exercise 11.16. Flipping coins. Flip a coin until the second head comes up. Let X be the number of flips needed to get the second head. What is the E(X). The first step is to find the expected value of getting the first head. What is the expected value of getting the first head? This will be an integer answer. QUESTION 4 Exercise 11.16. Flipping coins. Flip a coin until the second head comes up. Let X be the number of flips needed to get the second head. What is the E(X). The next step is to find the expected value of getting the second head. Because this is identical to finding the expected number of rolls for the first head (independent events), we just multiply the first head's expected value by 2. This will be an integer answer. QUESTION 5 Exercise 11.17 (a). Waiting for favorite song. Michael puts his iTunes on shuffle mode where songs are not allowed to be replayed. He has 2,781 songs saved on iTunes, and exactly one of these is his favorite. How many songs is he expected to have to listen to until his very favorite song comes up? Is this like Example 11.10, sampling without replacement, OR like Example 11.11, sampling with replacement? A. Example 11.11, sampling with replacement B. Example 11.10, sampling without replacement
Answers
In Exercise 11.10, the expected value of the number of butterflies found by Alice, Bob, and Charlotte is obtained by finding the expected value of the sum of three indicator random variables.
In Exercise 11.16, the expected value of the number of flips needed to get the second head in a coin flipping experiment is determined. These exercises involve different scenarios of sampling with and without replacement.
In Exercise 11.10, the expected value of X, the total number of butterflies found, is found by calculating the expected value of each indicator random variable (X1, X2, X3) representing whether Alice, Bob, and Charlotte found a butterfly, respectively.
The expected value of each indicator variable can be obtained by multiplying the probability of success (finding a butterfly) by 1 and the probability of failure (not finding a butterfly) by 0. Then, the expected value of X is calculated as the sum of the expected values of the indicator variables.
In Exercise 11.16, the expected value of X, the number of flips needed to get the second head, is determined. To find this value, we first need to find the expected value of getting the first head. This scenario is similar to Example 11.11, which involves sampling with replacement.
Each coin flip is an independent event, and the probability of getting a head is constant at 0.5.
Therefore, the expected value of getting the first head is 1/p, where p is the probability of success (0.5 in this case).
In Exercise 11.17 (a), the scenario of waiting for a favorite song in Michael's iTunes playlist involves sampling without replacement. Each song played is not replayed, and there is only one favorite song among the total number of songs.
Therefore, this scenario is similar to Example 11.10, sampling without replacement.
To find the expected number of songs Michael needs to listen to until his favorite song comes up, the formula for sampling without replacement is used, which is the reciprocal of the probability of selecting the favorite song at each step.
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Compare and contrast the cell structures / organelles found in plant and animal cells
• list 3 organelle / structure plant and animal cells have that are the same
• list 2 organelles / structures plant and animal cells have that are different
Answers
Answer:
Explanation:I need to get some answers too
The kidneys are situated immediately inferior and deep to which body part?
the stomach
the liver
the ribs
the spine
Answers
Answer: The Spine
Explanation:
The kidneys are situated immediately inferior and deep to the ribs body part. That is option C.
What is kidneys?The kidney is defined as the major organ of the urinary system of the body which is located retroperitoneal region of the abdomen (that is , behind the peritoneum).
The kidneys are situated below the diaphragm, one on either side of the spine. They are just below the rib cage.
Therefore, the rib cage can be said to be superior to the kidney organs in the abdomen.
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Two students are talking about what they learned in class. One says, "sex is biological, not socially constructed." Support or oppose the argument that sex is biological and not socially constructed. Use at least two course materials (articles, videos, podcasts, etc) to make your point.
Answers
Sex is a biological trait that refers to the observable physical and genetic characteristics that distinguish males from females. It is frequently assumed that sex is based on biological or genetic characteristics rather than social and cultural aspects.
The physical variations between males and females, such as genitalia and breasts, are some examples of sex differences. Thus, it is a biological characteristic rather than a social one. Both social constructionism and biological determinism, on the other hand, have opposing perspectives on gender. Biological determinism emphasizes that gender differences are inborn, while social constructionism emphasizes that they are socially produced. According to the social constructionism perspective, gender identity and the roles associated with it are the product of socialization and cultural expectations, whereas biological determinism focuses on innate biological differences and the impact of biology on gender.
The claim that sex is a biological trait and not socially constructed can be supported by two course materials. The article "Sex as Biological and Gender as a Social Construct" by Anne Fausto-Sterling argues that sex is a biological characteristic because it is based on genitalia and chromosomes, while gender is socially constructed. This article suggests that sex is primarily concerned with physical characteristics, while gender is linked to social and cultural expectations, which is consistent with the idea that sex is biological and gender is social.
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02.07 photosynthesis
Answers
Answer:
Photosynthesis 02.07RITA RIFFI
sunlight is made in to a chemical energy using chlorophyll. Then uses energy to convert co2 and water in to glucose.
Photosynthesis is the process by which plants, algae, and some bacteria convert sunlight, carbon dioxide, and water into glucose (a type of sugar) and oxygen. This process occurs in the chloroplasts of plant cells.
Here is a step-by-step explanation of the process of photosynthesis:
1. Light Absorption: Chlorophyll, a pigment found in chloroplasts, absorbs sunlight. This light energy is essential for photosynthesis to occur.
2. Conversion of Light Energy: The absorbed light energy is used to power a series of chemical reactions that convert carbon dioxide and water into glucose. This process is called the light-dependent reaction.
3. Production of ATP and NADPH: During the light-dependent reaction, energy is stored in the form of ATP (adenosine triphosphate) and NADPH (nicotinamide adenine dinucleotide phosphate). These molecules act as energy carriers in the next step of photosynthesis.
4. Carbon Fixation: The ATP and NADPH produced in the light-dependent reaction are used in the Calvin cycle, also known as the light-independent reaction or the dark reaction. In this step, carbon dioxide is converted into glucose using the energy stored in ATP and NADPH.
5. Release of Oxygen: As a byproduct of photosynthesis, oxygen gas is released into the atmosphere. This oxygen is essential for the survival of many organisms, including humans.
Overall, photosynthesis plays a crucial role in the Earth's ecosystem by providing oxygen and producing food for organisms. It is an essential process that sustains life on our planet.
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Which of the following is NOT observed at any point during mitosis?
Microtubule polymerization
Microtubule depolymerization
kinesin-like motor protein activity
Dynein-like motor protein activity
None of the above; All are observed during mitosis
Answers
The **NOT observed** event during mitosis is: **None of the above; All are observed during mitosis**.
In the process of mitosis, kinesin-like motor proteins play a crucial role in the proper segregation of chromosomes. These proteins interact with microtubules, assisting in the formation and function of the mitotic spindle. Since kinesin-like motor protein activity is indeed observed during mitosis, the correct answer is that all options listed are observed during mitosis. The purpose of mitosis is to create two genetically identical daughter cells from a single parent cell, ensuring accurate distribution of genetic material. The involvement of motor proteins, such as kinesin, is essential for this process to be completed successfully.
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2. What is the function of the cell membrane in cell division?
Answers
Answer: the main function is to control what goes in and out of the cell. It is made of a double layer of lipids (fats) imbedded with odd-looking protein molecules. Because it is a fat, only some things that are very tiny, like water and oxygen pass through this part.
Explanation:
consider a free ribosome. what enters this organelle, and what comes out of it, in the process of protein synthesis?
Answers
The messenger RNA (mRNA) enters the free ribosome, and a polypeptide emerges.
The process of translation involves a large number of other molecules and macromolecules in addition to the mRNA template. Each component's composition may alter between species; for example, ribosomes may contain varying amounts of polypeptides and rRNAs depending on the organism. However, the overall designs and operations of the machinery responsible for protein synthesis in both bacterial and human cells are comparable. An mRNA template, ribosomes, tRNAs, and numerous enzyme components must all be present for translation to take place. Protein synthesis can be broken down into the same three processes as mRNA synthesis: initiation, elongation, and termination. Both prokaryotes and eukaryotes translate in a similar way. The process of translation in the prokaryote E. coli will be examined in this section, along with any distinctions between prokaryotic and eukaryotic translation.
Hence, protein are synthesized from the mRNA sequence.
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What’s the most significant greenhouse gas increase
Answers
Answer:
Carbon dioxide (CO2) is the primary greenhouse gas emitted through human activities.
How does the cell wall protect a plant cell? The cell wall is thick and fibrous and provides a barrier between the cell and its external environment. The cell wall does not protect the cell because the cell membrane does. The cell wall is thin and flexible, which allows the cell to be moved without harming the organelles. The cell wall is on the inside of the cell and serves to contain the contents of the cell.
Answers
Answer:
The cell wall is thick and fibrous and provides a barrier between the cell and its external environment.
Explanation:
Cell wall is a structural feature found in specific organisms like plants, bacteria, algae and some fungi. In plants, cell wall is found to coat the cell membrane, hence, providing additional support to the plant cell. The major constituent of the plant cell wall is Cellulose, which confers its rigidity upon it.
The cell wall, due to its rigid nature, protects the contents of the plant cell. Hence, it serves as a barrier between the cell and Its external environment. This means that it helps regulate what goes into the cell e.g pathogens.
A. Origin of Life- Scientists Hypotheses Disproving Spontaneous Generation (Word Bank: air, sealed, open, bacteria, gauze, spontaneously) Through the early 1800s, people believed organisms could ________________ develop, an idea known as spontaneous generation. In 1668, many believed maggots were spontaneous generated from rotting meat. Francis Redi’s experiment disproved this by experimenting with meat in open_jars, tightly snealed_jars and jars covered with cloth netting. It was also believed that bacteria spontaneously generated in broth. Lazzaro Spallanzani removed the _________ from a flask, __________ the broth and sealed the flask. No bacteria generated without exposure to the air. Some people still supported spontaneous generation but thought that air was a ________ force, necessary for it to occur. In 1859, Louis Pasteur completely disproved spontaneous generation by using a special flask that allow ______________ in but captured bacteria before it could get to the broth. No _________________ grew in the flask after boiling = no spontaneous generation. 2. First Life (Word Bank: eukaryotes, prokaryotic, variety, self-replicating, organic, photosynthesis, oxygen) Earth’s atmosphere had to be very hot and with little oxygen for the first ________________ molecules to first form. Organic molecules clumped together for form ______________________ structures that later evolved into cells. __________________________ cells were the first to evolve. When cells gained the ability to do ___________________________, they used up carbon dioxide and put more __________________ into the atmosphere.
Answers
Answer:
kjb
Explanation:
mnef
Photosynthesis provides _____ in the atmosphere that support(s) much of the life on earth.
Answers
Photosynthesis provides oxygen in the atmosphere that support(s) much of the life on earth.
Photosynthesis is the process of producing one's own food. This process can be seen in plants, some bacteria and fungi. These organisms use the inorganic raw material like carbon dioxide, water and sunlight energy and produce food in the form of sugars, releasing oxygen as a by-product.
Oxygen is the most essential form of gas found in the earth. Majority of the organisms in the Earth are aerobic, that is they require oxygen for their survival. That is why oxygen supports much of the life on earth.
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The trp and lac operons are regulated in various ways. how do bacteria regulate transcription of these operons?
Answers
Operon is not transcribed:
-lac operon: lactose absent
-trp operon: tryptophan present
Positive control transcription of Operon does not speed it up:
Lactose and glucose are present, -lac operon
Tryptophan is lacking in the -trp operon.
Operon is transcribed quickly through positive control:
-lac operon: lactose present, glucose not
Only negative control is used to regulate the trp operon. The operon genes are not transcribed when tryptophan is present.
Both positive control and negative control are used to control the lac operon.
Negative control: —Transcription is inhibited when lactose is missing due to the activity of the repressor protein.
—The repressor protein is deactivated and transcription is triggered when lactose is present.
Positive control: —In the absence of glucose, another regulatory protein (CAP) attaches to the lac operon's promoter, speeding up transcription in the presence of lactose.
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The only cells that are capable of photosynthesis are the ones that contain:
a nucleus
chloroplasts
mitochondria
a cell membrane
Answers
Answer:
Chloroplasts
Explanation:
Answer:
Chloroplasts :)
Explanation:
Which of the following Kingdoms cannot get energy from Photosynthesis? A. Eubacteria B. Fungi C. Protista D. Planate
Answers
As we know there are three types of organisms capable to perform photosynthesis cyanobacteria (eubacteria), plants (Plantae), and algae (protist), so we can say that the correct answer is option B fungi.
Regarding the triplet code of DNA, which of the following sentences is true? 1 pike each DNA base codes for three amino acids there are three genes that code for a protein, each amino acid is coded for by three DNA bases each triplet codes for several amino acids
Answers
Answer:
The following sentence is true regarding the triplet code of DNA: Each amino acid is coded for by three DNA bases.
Explanation:
The genetic code is a set of rules that specify the correspondence between the three-letter codons in DNA and the twenty standard amino acids used to build proteins. Each codon codes for a single amino acid, except for three "stop" codons that signal the end of the protein sequence. Therefore, a sequence of three DNA bases (a triplet) corresponds to a specific amino acid, and the order of the triplets determines the order of amino acids in the protein sequence.