Answers
Answer:
it is a
Explanation:
Related Questions
List and give an example of the four ways that animals compete for resources.
Answers
Answer:
For example, animals may compete for territory, water, food, or mates. Competition often occurs between members of the same species. This is called intraspecific competition. This is the type of competition that is the driving force behind natural selection within a species.
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Answer: 1. Deer compete with each other for food in winter
2. In dry months, fish compete for water in a swamp.
3. Moray eels compete with each other for holes in a coral reef.
4. Plants compete for sun and water.
Explanation:
How does surface tension force the surface of water to curve
Answers
Answer:
the molecules at the surface are being pulled by other molecules. The pulling forces the water to curve. ... The positive hydrogen ends of one water molecule attract the negative oxygen ends of nearby water molecule.
Explanation:
Surface tension forces the surface of water to curve due to its tendency to reduce the surface area of water.
The surface tension of a liquid is in itself a tangential force acting parallel to the surface of the liquid due to the cohesive force of attraction between the molecules of the liquid.
The highly cohesive nature of water molecules means that the molecules at the air/water interface are more stuck together, creating elastic-like surface tension on the water. Thus, the water surface curves inward forming a concave shape.
In other words, the cohesive force of water molecules causes surface tension which in turn causes the surface area of water to reduce or curve inward.
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Explain how the egg and sperm from Mateo's parents, who do NOT have PKU, culd have combined to result in a child (Mateo) who DOES have PKU.Use the terms Meiosis, chromosomes, the PAH gene, egg, sperm, crossing over.
Answers
Phenylketonuria is an autosomal recessive genetic condition caused by a mutation in the PAH gene, which can be inherited from the parents, but it can also happen from a new mutation.
Mutation can happen during the production of new reproductive cells (sperms and eggs) because there is always a chance for mutation during the replication of genetic material, such as the one that occurs before meiosis.
However, given that this is an autosomal recessive condition, which means you need two copies of the mutated gene to express the condition, is more likely that Mateo's parents are both carriers of the condition, meaning they each have a defective copy of the gene but don't have the condition.
Each of us has two copies of each chromosome, with one of these copies coming from our mother and the other from our father. Reproductive cells have only half of the genetic information because they produce by meiosis, where the chromosomes undergo a crossing over, which mixes the original chromosomes and also results in a total of four cells with a copy of each chromosome.
This means that both the egg and the sperm that originated Mateo had a defective copy of the PAH gene, that was always present in his parents, and that is how he has PKU.
In a community, it was observed that 25% of the individuals have blue eyes.
Assuming that eye color is controlled by a single gene with two alleles, and that brown eyes are dominant to blue - what is the frequency of the heterozygote? Round your answer to 4 decimal points (and do not forget the leading zero before the decimal).
Answers
the frequency of the heterozygote (Bb) in the population is approximately 0.4431, or 44.31%. To determine the frequency of the heterozygote, we first need to determine the frequency of the blue-eyed homozygote and the brown-eyed homozygote.
Given that 25% of the individuals have blue eyes, we can infer that the frequency of the blue-eyed homozygote (bb) is 0.25, or 25% (since blue is recessive). Therefore, the frequency of the brown-eyed homozygote (BB) can be calculated as 1 - 0.25 = 0.75, or 75%.
Now, let's denote the frequency of the heterozygote (Bb) as p. Since there are only two alleles in the population (B and b), the sum of the frequencies of all genotypes must equal 1.
The frequency of the heterozygote can be calculated using the equation:
2pq + p^2 + q^2 = 1,
where p represents the frequency of allele B, and q represents the frequency of allele b.
Since brown eyes are dominant, the frequency of the brown allele (p) can be calculated as the square root of the frequency of the brown-eyed homozygote (BB), which is 2*0.75*0.25
Therefore, the frequency of the heterozygote (Bb) can be calculated as:
2(0.866)(0.134) + (0.866)^2 + (0.134)^2 ≈ 0.4431.
Rounding this value to four decimal points, we get a frequency of approximately 0.4431 for the heterozygote.
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Describe the characteristic of the endoplasmic reticulum
Answers
Answer:
The general structure of the endoplasmic reticulum is a network of membranes called cisterns, these bag-like structures are stretched together by the cytoskeleton. The phospholipid membrane surrounds the cystic space (or lumen), which is an extension of the nuclear space but is separated from the cytosol
What characteristic do you have that you hope to pass on to your progeny? Why?
Answers
Characteristics found in germ lines are generally passed down to the next generation of offspring through sexual reproduction, whereas traits found in somatic cells are not.
What is the significance of the passing of traits?Traits, also known as characteristics, are generally passed on to the next generation as they are present on germ line cells, such that in the case of the male, they produce sperm so, the active genes on the sperm will express in the offspring, and in the case of the female, the active gene on the ovum will express in child.
Hence, characteristics found in germ lines are generally passed down to the next generation of offspring through sexual reproduction, whereas traits found in somatic cells are not.
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Te enzyme trypsin aids in protein digestion in the small intestine. Te relative
activity of trypsin at diferent pH values is shown in Figure 1.
Which of the following statements best explains the activity levels of trypsin shown
in Figure 1?
(A) The small intestine releases inhibitor molecules that block the activity of
trypsin unless it is at its optimum pH.
(B) The number of efective collisions between trypsin and its substrate increase
at higher pH values.
(C) As pH values increase, the substrate concentration decreases, leading to an
eventual decline in the rate of the trypsin-catalyzed reaction.
(D) At extremely low pH values, trypsin is denatured and cannot function
efciently
Answers
The statement that best explains the activity levels of trypsin in Figure 1 is (D) At extremely low pH values, trypsin is denatured and cannot function
efficiently.
Figure 1 shows the activity levels of trypsin, a protease enzyme of small intestine, as a function of pH.
The data indicates that trypsin is most active in moderate pH ranges, between 6 and 8, where it exhibits its highest activity levels. However, as the pH values become more acidic or basic, the activity of trypsin decreases significantly.
At extremely low pH values, trypsin is denatured and cannot function efficiently. This is evidenced by the sharp drop in activity at pH levels below 4.
Therefore, the statement that best explains the activity levels of trypsin in Figure 1 is (D).
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Base your answers to questions 1 through 3 on the diagram below and on your knowledge
of Earth science. The diagram represents the expansion of a portion of the universe from its
origin until the present. The timeline represents billions of years. Letter X indicates two
celestial objects.
Timeline (billion years ago)
Present T
5-
10-
Origin of
Universe
15-
1. Two pieces of evidence that support the theory that the universe is expanding are the
A) red shift of light from distant stars and the existence of nuclear fusion
B) red shift of light from distant stars and the existence of cosmic background
radiation
C) blue shift of light from distant stars and the existence of nuclear fusion
D) blue shift of light from distant stars and the existence of cosmic background
radiation
polestial objects labeled X are
Answers
The two pieces of evidence that support the theory of the expanding universe are the red shift of light from distant stars and the existence of cosmic background radiation.
The correct answer is option B.
1. Red shift of light from distant stars: The observation of redshift in the light coming from distant galaxies provides evidence for the expansion of the universe. Redshift occurs when the light waves from an object moving away from an observer are stretched, causing a shift towards longer wavelengths. This phenomenon is consistent with the Doppler effect, where the wavelength of light appears to stretch as the source moves away. The redshift of light from distant stars indicates that galaxies are moving away from us and from each other, supporting the idea that the universe is expanding.
2. Existence of cosmic background radiation: The discovery of cosmic background radiation further supports the theory of the expanding universe. Cosmic background radiation is a faint, uniform microwave radiation that permeates the entire universe. It is believed to be residual radiation from the Big Bang, the initial event that is thought to have initiated the expansion of the universe. The presence of cosmic background radiation provides strong evidence for the hot, dense early stages of the universe and its subsequent expansion.
Based on the information provided in the diagram, it is not possible to determine the identity or nature of the celestial objects labeled X. The diagram only represents the expansion of the universe over time and does not provide specific details about individual celestial objects.
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Lab for polluted Forrest in allele frequency’s G5
Answers
To conduct a lab for allele frequencies in a polluted forest, you would need to collect samples of the target species from both the polluted and unpolluted areas of the forest. Here are the general steps you could follow:
Identify the target species: Select a species of interest that is present in both the polluted and unpolluted areas of the forest. This could be a plant or an animal.
Collect samples: Collect tissue samples from the target species in both the polluted and unpolluted areas of the forest. This could involve taking leaf or stem samples from plants, or blood or tissue samples from animals.
Extract DNA: Extract DNA from the tissue samples using a DNA extraction kit.
Amplify DNA: Amplify a specific DNA region of interest using the polymerase chain reaction (PCR). The region should include one or more genetic markers that can distinguish between different alleles.
Sequence DNA: Sequence the amplified DNA fragments using Sanger sequencing or another sequencing method.
Analyze sequence data: Analyze the sequence data to determine the frequencies of different alleles in the polluted and unpolluted populations. This could involve comparing the frequency of specific nucleotide variations or genetic markers between the two populations.
Interpret results: Interpret the results to determine if there are any significant differences in allele frequencies between the polluted and unpolluted populations. This could provide insight into the impact of pollution on genetic diversity and population structure.
Note that this is a general overview of the steps involved in conducting a lab for allele frequencies in a polluted forest. The specific details of the lab will depend on the target species and genetic markers of interest, as well as the specific research question being addressed.
Which phrase describes a feature of a Mercator projection Is least commonly used sizes most features to scale present longitude as parallel shows most accurately near the prime meridian
Answers
Answer:
C.) presents longitude lines as parallel
Explanation:
Took it on E2020
Thad rolls his bowling ball down the lane with a
force of 63 Newtons. If his ball has a mass of 7 kg,
what is the resulting acceleration of the ball?
35.
Answers
The acceleration of the ball is, 9m/s.
How, explain your answer briefly?Given data:
The mass of the bowling ball is, m = 7 kg.
The magnitude of force offered by ball is, F = 63 N.
The above problem is based on the Newton's second law of motion. According to the Newton's Second law of motion, the applied force is equal to the product of mass and acceleration of the body.
So,
F = ma
Solving as,
a = F/m
a = 63/7
Thus, we can conclude that the acceleration of the ball is, 9m/s.
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Deer mice are usually dark brown and live in forests with dark soil. However, the deer mice in the Sand Hills of Nebraska are lighter brown and live in an area with light, sandy soil.
Based on this information, what ,begin emphasis,most,end emphasis, likely caused the change in the Sand Hills deer mice?
Answer options with 4 options
A.
Lighter colored mice were preferred by females.
B.
Lighter colored mice came from snowy habitats in the north.
C.
Lighter colored mice had more dominant genes in their new habitat.
D.
Lighter colored mice were more likely to avoid predators and to reproduce.
Answers
Lighter colored mice were more likely to avoid predators and to reproduce. Therefore, option (D) is correct.
The lighter brown coloration of the deer mice in the Sand Hills of Nebraska is likely an adaptation that provides them with a survival advantage in their specific habitat. The light, sandy soil in the area may offer better camouflage for lighter colored mice, making them less visible to predators and increasing their chances of survival.
As a result, these mice would have a higher likelihood of successfully reproducing and passing on their lighter coloration traits to future generations.
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Poisons and salts are removed from the blood by the _____.
lungs
stomach
kidneys
skin
Answers
Answer:
Kidneys
Explanation:
The kidneys remove wastes and excess water in the body through the urine, as urine flows from the kidneys to the bladder through two thin tubes located on both sides of the bladder called the ureter, and the bladder stores urine, and each of the kidneys consists of about one million filtering units called the renal tubular unit contains Each renal tubular unit has a filter called the glomerulus and tubule, and the renal tubular unit operates through a two-step process:
glomerulus: filters blood.
Tubule: Returns the necessary substances to the blood and removes waste.
AnswEr:
Kidneys
Explanation:
I hope dis helps :D
Is wetland salt water or fresh water ?
Or both
Estuary fresh water or salt water ? Or both
Ocean salt water or fresh water ?
Lake , river , stream , wetland , pond
Answers
Which of the following explains how different environments support different varieties
of organisms?
A. Every environment has the same basic features.
B. Every organism has adaptations that allow them to survive in a certain type of
environment.
C. All organisms have the same basic needs.
D. Environments change to fit the needs of all the organisms that live in them.
Answers
Answer:
the answer is B
Explanation:
Answer:
B
Explanation:
d) What happens to a microscope if place at the edge?
Answers
When the object is placed on the slide and is in focus for each objective, the space between the slide and the objective lens gets reduce, so the microscope shouldn't be set exact at the edge.
As the objective magnification increases, the working space also increases. Therefore, you need to change it to a higher power target.
Change the focus knob to increase the stage as you look at the objective lens and stage from the side. Without permitting the objective to make contact with the coverslip, increase it as high as it can go. The sample's focus or the condenser and light intensity might need to be arranged.
Thus the accurate way to focus is that adjustments need to be made effectively and smoothly
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In Activity 2, which of the respirometers serves as a control? Explain your answer! Why was it the control? You should write at least 3 sentences to explain this. Respirometer A contains germinated beans. respirometer B contains dormant beans and plastic beads respirometer C contains plastic beads.
Answers
In Activity 2, the respirometer C serves as the control. A control is an essential part of any scientific experiment as it provides a baseline against which the experimental results can be compared.
Respirometer C containing only plastic beads does not contain any living organisms and therefore does not undergo cellular respiration. By comparing the results of respirometers A and B with the control (respirometer C), any changes in oxygen consumption and carbon dioxide production can be attributed to the metabolic activity of the germinated beans in respirometer A and the dormant beans in respirometer B.
This allows researchers to determine the specific effects of germination on cellular respiration by isolating the variables and eliminating any external factors that could influence the results.
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What happens during rusting of an iron nail?
1 sulfur and oxygen combine to form a sulfur dioxide coating
2 iron and oxygen combine to form iron oxide
3 sulfur, iron, and oxygen combine to form iron sulfoxide
4 iron and sulfur combine to form iron sulfide
Answers
Answer: the correct answer is B number 2
Explanation: I just answered this question
what does dimensions mean
Answers
Answer:
you want to know what the dimensions are?
the dimensions are the height (up and down) and the base length (dotted line)
which option correctly describes the mode of inheritance for sickle cell anemia
recessive, X-linked dominant, X-linked recessive Or dominant
Answers
The mode of inheritance for sickle cell anemia is recessive.
Sickle cell anemia is a type of inherited genetic disorder where the blood cells are shaped as sickle or crescent-shaped instead of being oval flat disc-shaped cells. This peculiar structure of the abnormal red blood cells deems them unable to carry sufficient oxygen to the tissues and organs of the body.
To be affected by sickle cell anemia, an individual has to inherit one copy of the sickle cell gene from each parent, irrespective of gender. Thus, it can be also called a type of autosomal recessive disease. The disease is only expressed in the homozygous recessive condition.
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1. Below is a diagram of the male
reproductive system. Which structure is
represented by D?
A. scrotum
B. testes
C. prostate gland
D. epididymis
Answers
Answer:
A:scrotum
Explanation:
its part of the male reproductive system. I looked it up.
The Siamese cat breed has a light colored body and dark colored head, tail, and feet, all of which are called points. The Burmese cat breed has a dark colored body and points that are almost the same color as the body. Crossing Siamese with Burmese can produce the Tonkinese cat breed, which has coat and point color that is intermediate to the Siamese and Burmese parents.
In all three breeds, a temperature sensitive enzyme is responsible for the dark coloration of the points. However, it is active only at the extremes of the body where it is coolest. Select the statements that are true regarding the evidence of incomplete dominance and incomplete penetrance in these breeds.
a. Intermediate coat color in Tonkinese demonstrates incomplete dominance.
b. Development of points in Tonkinese demonstrates incomplete penetrance.
c. Light coat color in Siamese demonstrates incomplete penetrance.
d. Darker color at the extremes of the body in Tonkinese demonstrates incomplete dominance.
Answers
Answer:
Correct answer is A and B.
Explanation:
Because the Tonkinese breed has a coat that is intermediate to the coat color of the Siamese and Burmese, we can say that this demonstrates incomplete dominance which means that the dominant allele does not have the ability to completely mute the recessive allele in the phenotype.
This is also true because of the development points on the coat of the Tonkinese breed.
So the correct answer is A and B.
I hope this answer helps.
Which of the following is an example of a polysaccharide?
A)glucose
B)starch
C)maltose
D)fructose
E)sucrose
Answers
Answer:
B
Explanation:
starch is an example of polysaccharide
A student observes a cell through a microscope. She notices that it does not have a nucleus but it does have a cell wall, a cell membrane, and numerous ribosomes. Which of the following best describes the type of cell the student is observing?
Answers
Answer:
The cell is a prokaryotic cell
Explanation:
Prokaryotic cells don't have a nucleus or even membrane bound organelles.
How does gel electrophoresis work? Group of answer choices DNA is negatively charged. When an electrical current is passed through a gel, the DNA is repelled by the nearby negative current and pushed across the gel towards the positively charged side. DNA is positively charged. When an electrical current is passed through a gel, the DNA is repelled by the nearby negative current and pushed across the gel towards the positively charged side. DNA is negatively charged. When an electrical current is passed through a gel, the DNA is repelled by the nearby positive current and pushed across the gel towards the negatively charged side. DNA has no charge. When a current is passed through a gel, the DNA is repelled by the negative current and pushed across the gel towards the positively charged side.
Answers
Answer:
DNA is negatively charged. When an electrical current is passed through a gel, the DNA is repelled by the nearby negative current and pushed across the gel towards the positively charged side.
Explanation:
Electrophoresis has become a standard molecular biology technique. This technique is based on the use of a constant-uniform electric field that enables the separation and identification of DNA fragments with different lengths, which form bands in the electrophoresis gel. Electrophoresis can be used to analyze not only DNA, but also RNA and proteins. During electrophoresis, the fragments of DNA that are negatively charged will migrate towards the positively charged electrode, where the duration of this movement will depend on the size of the DNA fragment, as well as of the pore size in the gel.
E1 Biol 2281 usage of internet to analyze nuclei acid
Are these right?
Answers
We can see here that going through the answers provided in the image, we can deduce that they are correct though it will be proper to cross-check before submitting.
What is nuclei acid?Nucleic acids are biomolecules that play a crucial role in storing, transmitting, and expressing genetic information in living organisms. They are essential for the functioning and inheritance of genetic traits.
Both DNA and RNA are polymers made up of repeating units called nucleotides. Each nucleotide consists of three components: a sugar molecule (deoxyribose in DNA and ribose in RNA), a phosphate group, and a nitrogenous base.
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Complete the sentence. Lobbyists of ______________ use access to political leaders and other federal members to attempt to influence environmental policy.
the courts
Congress
interest groups
the presidency
Answers
Lobbyists of interest groups use access to political leaders and other federal members to attempt to influence the environmental policy. Hence, correct option is C.
Environmental policy: What is it?An environmental policy can be defined as any standard that a government, business, or other public or private institution uses to link environmental concerns to human activity.
By interfering with political leaders and other federal members with the help of their interest organizations, someone who is employed, contracts for economic considerations, and is paid makes a considerable effort to affect environmental policy.
Such lobbyists routinely employ this technique to change environmental legislation in some way, either directly or inadvertently.
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URGENT
A steroid hormone approaches its target cell. Which will happen first?
The hormone will enter the nucleus
The hormone will combine with proteins to form lipoproteins
The hormone and its receptor will interact with the DNA
The hormone and its receptor will enter the cell’s nucleus
Answers
A steroid hormone approaches its target cell, therefore the hormone will enter the nucleus and is what will happen first which is therefore denoted as option A.
What is a Hormone?This is referred to as a chemical messenger which is released directly into the bloodstream and is responsible for the control of certain metabolic reactions occurring in the cell and an example is steroid hormone such as androgens.
In a situation whereby a steroid hormone approaches its target cell, it first passes through the plasma membrane before it then becomes adhered to the receptors which are present in the nucleus or cytoplasm.
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What is the overwhelming conclusion from the vast majority of trained experts who study climate change?
The world is warming because of us.
The world is not warming enough to be concerned about.
The effects of climate change will not be serious.
The world is warming because of natural cycles.
Answers
The overwhelming conclusion from the vast majority of trained experts who study climate change is that the world is warming because of us, meaning human activities are contributing significantly to the observed global warming trend.
What is Climate change?
Climate change refers to a long-term and significant change in the average weather patterns and temperatures of the planet. It is caused by a variety of factors, including human activities such as the burning of fossil fuels and deforestation, as well as natural phenomena such as volcanic eruptions and changes in the sun's energy output.
The overwhelming conclusion from the vast majority of trained experts who study climate change is that the world is warming because of human activities, particularly the burning of fossil fuels like coal, oil, and gas, which releases large amounts of greenhouse gases such as carbon dioxide into the atmosphere.
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The periodic table
a.) is arranged by atomic mass
b.) was developed by early alchemists
c.) is arranged by number of protons
d.) is divided into vertical periods and horizontal groups
Answers
Answer:
D.)
Explanation:
The periodic table is divided into vertical periods and horizontal groups.