What type of microscope would you use to view a live sample?
1. Scanning Electron Microscope
2.Transmission Electron Microscope
3.Magnifying glass
4. Light Microscope
Answers
Answer:
Compound microscopes
Compound microscopes are light illuminated. The image seen with this type of microscope is two dimensional. This microscope is the most commonly used. You can view individual cells, even living ones.
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A farming technique used by a local farmer unexpectedly inhibits the absorption of oxygen through the roots of her potatoes. Which farming technique did she likely use?
Flood irrigation
Furrow farming
Nitrate fertilizing
Spray fertilizers
Answers
Answer:
Nitrate fertilizing
Explanation:
a sceintist measures the amount of oxygen produced during the same time interval at varying depths in a pond. the data are summarized below. which of the following statments is the most likely explantaion of the data
Answers
A scientist measures the amount of oxygen produced during the same time interval at varying depths in a pond. The data are summarized below:Depth (meters) Oxygen Production (mg/L)0 0.62 1.24 1.56 0.98 0.5. The most likely explanation of the data is that the oxygen production decreases with depth in the pond.
This is evident from the data as the oxygen production is highest at the surface (0 meters) and decreases as we go deeper into the pond. At a depth of 1 meter, the oxygen production is 0.6 mg/L, which is less than the oxygen production at the surface.
Similarly, at a depth of 2 meters, the oxygen production is 0.4 mg/L, which is less than the oxygen production at a depth of 1 meter. This trend continues until a depth of 4 meters where the oxygen production is lowest (0.5 mg/L). Hence, we can conclude that oxygen production decreases with depth in the pond.
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what helps make the human brain unique compared to other species?
Answers
One aspect that helps make the human brain unique compared to other species is the size and complexity of the cerebral cortex, the outer layer of the brain that is responsible for many higher level functions such as perception, consciousness, and decision-making.
The human cerebral cortex is much larger and more complex than the cortex of other species, with a greater number of folds and more densely packed neurons. This increased size and complexity are thought to be a key factor in the advanced cognitive abilities that make us human, such as our capacity for abstract thinking, language, and self-awareness.
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antibiotics are substances used to help fight an infection of streptococcus, a bacterium that causes strep throat. overuse of these antibiotics can
Answers
Antibiotics are substances used to help fight an infection of streptococcus, a bacterium that causes strep throat. overuse of these antibiotics can Select for resistant organisms.
Antibiotics are used to treat streptococcus throat. Bacteria are killed by antibiotics. By eliminating bacteria, strep throat symptoms can be lessened and the condition can heal a little more quickly. Additionally, some uncommon but serious conditions that strep throat patients may experience can be avoided with the use of antibiotics.
Antibiotics can modify bacteria to the point that they no longer operate against them when used too frequently or for the wrong reasons. This is referred to as antibiotic resistance or bacterial resistance. Even the most potent medicines on the market are no longer effective against some germs.
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The light energy has now been converted to chemical energy that is stored in _________ and _________
molecules. These molecules are used in the _________
to help make sugars.
Answers
Answer:
Sunlight is converted to chemical energy in the form of ATP (adenosine triphosphate), which is the main energy-storing molecule in living organisms. ATP is then transported throughout the chloroplast and used to provide the chemical energy necessary to power other metabolic reactions.
To make his fish farm more sustainable, a farmer stops using feed made from wild-caught fish and starts using feed made from grains instead. What is the main reason that the ethics of using grain-based feed are still questionable?
A.
Growing the grain has its own costs to the environment.
B.
It places the fish farmers in competition with grain farmers.
C.
Changing feed sources leads to the overpopulation of wild fish.
D.
It fools consumers into thinking the farmed fish are healthier.
Answers
Answer:
I think the answer is A
Explanation:
Because it makes the most sense
True or false
The environment contributes to determining whether a mutation is advantageous, deleterious, or neutral.
Answers
Hey there :)
Option TRUE will be the answer.
Reason :-
The environment contributes to determining whether a mutation is advantageous, deleterious, or neutral. Also, the environment or selective pressure determines whether a mutation is beneficial or dangerous.
Usually mutuations are harmless, but in the rarest cases, it can even destroy or affect the whole world.
Example:- From COVID-19's mutation, Deltacron, Florona and Ba12 viruses have evolved.
~Benjemin360
`What do you mean by physiological functions for plants?
Answers
Answer:
Plant physiology deals with different plant structures and their functioning. It enables analyzing processes in plants, namely – photosynthesis, mineral nutrition, respiration, transportation, and ultimately plant development and growth which are traits displayed by living entities.
Explanation:
Hope this helps! :)
2. Erika hasn't eaten since early this morning. It is now time for dinner. Her stomach is growing, and she feels very hungry. One reason that she is feeling hungry is because:
Answers
Answer:
metabolism has occurred and she needs more energy to enhance anabolism and metabolism
Explanation:
I think you mean growling and not growing
By the 1950s, the competition to describe the genetic materials structure began. dna was first examined by_____________ analysis, a technique for determining the three-dimensional atomic structure of a molecule.
Answers
By the 1950s, DNA was first examined by X-ray crystallography analysis, a technique for determining the three-dimensional atomic structure of a molecule.
X-ray crystallography analysis was used in the 1950s to determine the structure of DNA. This technique involves exposing a crystallized molecule to X-rays and analyzing the diffraction patterns created when the X-rays interact with the atoms within the crystal.
By studying these patterns, scientists can deduce the three-dimensional atomic arrangement of the molecule. During this time, there was intense competition among researchers to solve the structure of DNA, as understanding its structure was key to understanding its role in genetic inheritance.
Rosalind Franklin and Maurice Wilkins were prominent figures in this field, and their work on X-ray crystallography of DNA contributed to James Watson and Francis Crick's famous discovery of the double helix structure of DNA in 1953. This groundbreaking finding paved the way for numerous advancements in genetics and molecular biology.
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1 point
Carbon is stored in leaves in various forms, such as sugar. When leaves
decay, they lose mass. Which of the following sentences explains what
happens to the carbon that is stored in leaves when they decay? *
The carbon is destroyed as the leaves decompose
The carbon evaporates
The carbon is converted into nitrogen by bacteria in the soil
The carbon is converted into carbon dioxide and released into the atmosphere
Answers
Answer:
D.The carbon is converted to carbon dioxide and released into the atmosphere
Explanation:
Proceed though meiosis to anaphase 1 . Which chromosomes went up and which went down?
Up : Down :
Answers
Answer:
The upper chromosomes went up and lower chromosomes went down.
Explanation:
Anaphase 1 of meiosis, the chromosomes that are present at the upper side went up and move towards the pole while on the other hand, the chromosomes which are located at the lower side went down moves toward another pole. Both chromosomes remain attached to one another in anaphase 1 while in telophase I, the chromosomes arrive at opposite poles of the cell.
Explain how a pond could become a swamp.
Answers
Answer:
if lots of plant life began to grow in it, the soil started to erode to make it muddy and unstable, and it was perpetually damp, moist and humid, certain creatures would start to live there and it would be very close to becoming a swamp
Explanation:
If I formed 4.29 moles of Fe2O3 how many liters of O2 did I use?
4 Fe + 3 O2 → 2 Fe2O3
Round your answer to 2 decimal places and, if needed, enter scientific notation like this 6.02e23 (would mean 6.02 x 1023.)
Answers
To determine the volume of \(O_2\) used when forming 4.29 moles of \(Fe_2O_3\), we need to use the stoichiometry of the balanced chemical equation. Approximately 144.18 litres of \(O_2\) are used
The given balanced chemical equation is 4 Fe + 3 \(O_2\) → 2 \(Fe_2O_3\). From this equation, we can see that 3 moles of \(O_2\)are required to produce 2 moles of \(Fe_2O_3\). To find the volume of \(O_2\)used, we need to convert the number of moles of \(Fe_2O_3\)to moles of \(O_2\), and then convert moles of \(O_2\) to litres.
Using the given information, we know that 4.29 moles of \(Fe_2O_3\)were formed. To find the moles of \(O_2\) used, we can set up a ratio using the stoichiometry of the balanced equation. The ratio of \(O_2\) to \(Fe_2O_3\)is 3:2, which means for every 2 moles of \(Fe_2O_3\), 3 moles of \(O_2\) are used.
Now, we can set up the following proportion:
(3 moles \(O_2\)/ 2 moles \(Fe_2O_3\)) = (x moles \(O_2\)/ 4.29 moles \(Fe_2O_3\))
Solving for x, we find:
x = (3 moles \(O_2\)/ 2 moles \(Fe_2O_3\)) * 4.29 moles \(Fe_2O_3\)
x ≈ 6.435 moles \(O_2\)
Finally, to convert moles of \(O_2\) to litres, we can use the ideal gas law. At standard temperature and pressure (STP), 1 mole of any gas occupies 22.4 litres. Therefore, the volume of \(O_2\) use is:
Volume of \(O_2\)= 6.435 moles \(O_2\)* 22.4 liters/mole
The volume of \(O_2\)≈ 144.18 litres
In summary, when 4.29 moles of \(Fe_2O_3\)are formed, approximately 144.18 litres of \(O_2\)are used.
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Explain how form and function are related in human cells, including examples. Use at least five sentences in your answer. The shape of a cellular structure is related to the function they have perform
Compare and contrast epithelial and muscle tissues. Use at least three sentences in your answer.
Answers
Explanation:
Form and function are intimately related in human cells. The shape and structure of cellular components are often specifically designed to carry out their respective functions effectively. For example, red blood cells are disc-shaped with a concave center, which increases their surface area for efficient oxygen and carbon dioxide exchange. Neurons have long, branching extensions called dendrites and axons, allowing them to transmit electrical signals over long distances.
Epithelial tissues are composed of closely packed cells that form protective barriers and linings in the body. They cover external surfaces (such as the skin) and line internal organs and cavities (such as the digestive tract). In contrast, muscle tissues consist of cells that are specialized for contraction and movement. There are three types of muscle tissues: skeletal muscle, responsible for voluntary movements; cardiac muscle, found in the heart; and smooth muscle, which controls involuntary movements in organs like the intestines.
Epithelial tissues primarily function in protection, absorption, and secretion. They have tightly packed cells with minimal extracellular matrix. In contrast, muscle tissues are specialized for contraction and movement. They contain long, elongated cells (muscle fibers) that can generate force. Skeletal muscle is striated and allows for voluntary movements, while cardiac and smooth muscles have different structures and functions specific to their respective roles in the body.
In summary, the relationship between form and function is evident in human cells. Cellular structures are designed with specific shapes and arrangements to perform their functions efficiently. Epithelial tissues provide protective barriers and linings, while muscle tissues enable contraction and movement. Understanding the relationship between form and function helps us appreciate the intricate design of cells and tissues in the human body.
plz help!
The crow is an example of an organism that survives well in the presence of
humans. In many cities, large flocks of crows eat food remains thrown away
by humans.
Which of the following BEST describes crows?
A) high adaptability
B) low population size
C) low available habitat
D) high variation in their population
The northern white rhinoceros has only a few remaining individuals, all in captivity. Which of the following describes the largest threat to the survival of this species?
A.) low adaptability
B.) low population size
C.) high vatiation in the population
D.) high amount of available habitat
Which of the following is an example of a mass extinction?
A.) Humans killed millions of passenger pigeons for food and sport.
B.) All the dodo birds living on the island of Mauritius are now dead.
C.) Mastodons. a group of organisms similar to elephants, have no individuals alive today.
D.) All the dinosaurs, along with 50% of all species alive at the time died out when an asteroid struck Earth.
Answers
Answer:
1. high adaptability
2. low population size
3. All the dinosaurs, along with 50% of all species alive at the time died out when an asteroid struck Earth.
Someone plz help me :(
Answers
Adding more solute to a solution changes the A. solubility of the solute B. concentration of the sation. C. polarity of the solute molles.
Answers
Answer:
b
Explanation:
adding more solute increases the concentration of the solution
State the advantages and disadvantages of asexual reproduction over sexual reproduction in plants.
Answers
Asexual reproduction is a form of reproduction in which offspring are produced from a single parent, without the involvement of gametes or fertilization.
What is the advantages and disadvantages of asexual reproduction over se---xual reproduction in plants?
Advantages of asexual reproduction in plants include:
Efficiency: Asexual reproduction is a faster and more efficient way of producing offspring than sexual reproduction. There is no need to search for a mate or to produce and distribute gametes.
Genetic uniformity: Offspring produced through asexual reproduction are genetically identical to the parent plant, which means that desirable traits can be maintained and propagated.
Survival: Asexual reproduction can help plants survive in harsh conditions, such as in environments with low resources or in areas where pollinators or mates are scarce.
Disadvantages of asexual reproduction in plants include:
Lack of genetic diversity: Because offspring are genetically identical to the parent plant, there is no genetic diversity, which can make the plant more vulnerable to diseases and environmental changes.
Adaptability: Because there is no genetic variation, plants that reproduce asexually may not be able to adapt to changing environmental conditions as well as sexually reproducing plants.
Accumulation of deleterious mutations: Asexual reproduction can lead to the accumulation of deleterious mutations over time, which can have negative effects on the health and fitness of the offspring.
Advantages of se---xual reproduction in plants include:
Genetic diversity: Se---xual reproduction leads to offspring with genetic diversity, which increases the chance that some offspring will have traits that are beneficial in different environments.
Adaptability: Se---xual reproduction allows plants to adapt to changing environmental conditions by producing offspring with different traits.
Elimination of deleterious mutations: Se===xual reproduction can help eliminate deleterious mutations by recombining genetic material from two parents.
Disadvantages of se---xual reproduction in plants include:
Energy cost: Se---xual reproduction is a more energy-intensive process than asexual reproduction, as it requires the production and maintenance of gametes and involves the search for a mate.
Reduced efficiency: Se---xual reproduction is a less efficient way of producing offspring than asexual reproduction, as only half of the offspring will inherit desirable traits from each parent.
Risk of producing less fit offspring: Se---xual reproduction increases the chance of producing less fit offspring, as the traits of the offspring are determined by chance and may not be as well-suited to the environment as the traits of the parents.
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True or false: The number of bones in the body increases from the time of birth to adulthood.
Answers
Answer:
True
Explanation:
But when you become too old they decreases
False. The number of bones in the human body does not increase from birth to adulthood. At birth, a baby has around 270 bones, but as the baby grows and develops, some of these bones fuse together. By the time a person reaches adulthood, they typically have 206 bones.
Although it may seem counterintuitive, the number of bones in the human body actually decreases from birth to adulthood. This is because many of the bones in a baby's body are not fully developed and are made up of several separate pieces of bone, which eventually fuse together as the baby grows and develops. For example, the skull of a newborn baby is made up of several bones that are not yet fused together. As the baby grows and develops, these bones gradually fuse together to form the skull we recognize in adults.
In addition to the bones that fuse together, there are also some bones in the body that are not present at birth but develop as a person grows. For example, the kneecap (patella) is not present at birth but typically begins to ossify (harden) between the ages of 3 and 5 years. Overall, while the number of bones in the human body does not increase from birth to adulthood, the way in which these bones are structured and arranged changes significantly as a person grows and develops.
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Assignment 1: Evidence for Evolution
Patterns based on observations of fossils:
[Example:] The observation made by Darwin that living species of armadillo can be found in the same area of Argentina where fossils of extinct glyptodonts were reported. Both species are very similar, with the glyptodon being like a giant armadillo. This observation can be explained if the two species are evolutionary related, thus belonging to the same lineage of species but with modifications.
Source: Charles Darwin’s Evidence for Evolution, by Dr. Niles Eldredge
.
.
.
B. Patterns based on observations of similarities among species:
.
.
.
C. Patterns based on observations regarding the distribution of organisms
.
.
Answers
The distribution of organisms provides evidence for evolution through patterns observed in geographic distribution, endemic species on islands, and changes in distribution seen in the fossil record.
Observations regarding the distribution of organisms provide valuable evidence for evolution. One such pattern is the geographic distribution of species. Similar environments often contain distinct yet closely related species. This can be observed in different regions around the world.
For example, the marsupials in Australia, such as kangaroos, koalas, and wombats, show remarkable similarities in their reproductive and developmental characteristics. These similarities suggest a common ancestry and adaptive radiation in response to the unique Australian environment.
Another significant observation is the presence of endemic species on islands. Islands provide isolated habitats, allowing for unique evolutionary processes to occur. The Galapagos Islands, famously studied by Darwin, exhibit an array of species found nowhere else on Earth.
The finches he observed there had different beak shapes and sizes, each adapted for specialized feeding habits. This diversification is thought to have occurred through natural selection acting on a common ancestor.
Furthermore, fossil records indicate that the distribution of organisms has changed over time. For instance, the discovery of similar fossils in South America and Africa suggests that these continents were once connected, supporting the theory of continental drift and explaining the presence of related species in both regions.
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Know the details of an action potential, including the specific movement of molecules to cause depolarization, repolarization. Is this statement true or false?
a) True
b) False
Answers
Know the details of an action potential, including the specific movement of molecules to cause depolarization, repolarization. The given statement is a) True.
An action potential is a rapid electrical event that occurs in the membrane of a neuron or muscle cell. It consists of two main phases: depolarization and repolarization.
1. Depolarization: At rest, the cell membrane has a negative charge inside (-70 mV) relative to the outside. When a stimulus occurs, voltage-gated sodium channels open, allowing an influx of positive sodium ions (Na+) into the cell. This causes the membrane potential to become less negative, or depolarized, reaching around +30 mV.
2. Repolarization: After depolarization, voltage-gated potassium channels open, allowing an efflux of positive potassium ions (K+) out of the cell. This restores the negative charge inside the cell, bringing the membrane potential back to its resting state (-70 mV). Meanwhile, sodium channels close, preventing further sodium influx.
The statement is true, as it accurately describes the details of an action potential, including the specific movement of molecules (sodium and potassium ions) during depolarization and repolarization.
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What are two ways to increase the energy of a wave?
•Increase the wavelength and increase the frequency
Increase the amplitude and increase the frequency
Decrease the amplitude and increase the wavelength
Increase the speed and decrease the frequency
Answers
The two ways to increase the energy of a wave are increase the amplitude and increase the frequency. The correct option is B.
What is a wave?A wave is a propagating dynamic disturbance of one or more quantities in physics, mathematics, and related fields.
Periodic waves occur when quantities oscillate repeatedly about an equilibrium value at some frequency.
The amplitude and frequency of a wave are related in such a way that they are inversely proportional. With increasing frequency, the amplitude decreases. As the frequency decreases, the amplitude increases.
The amount of energy in a wave is determined by its height, wavelength, and the distance over which it breaks.
When equal wavelengths are used, a wave with a larger amplitude will release more energy when it returns to sea level than a wave with a smaller amplitude.
Thus, the correct option is B.
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help ill give free brainleist
Answers
—Evidence—
•] Goddard's many firsts was the successful test of the world's first liquid-propelled rocket.
Answer:
for other person
Explanation:
plzz plzz plzzz plzzz plzz help me (write any two method for identification of fossils?)
Answers
Answer:
1.You can identify a fossil by determining it's age by comparing it to similar fossils.
2. You can measure the decay of isotopes within the fossil
Explanation:
: )
Karyotyping is used to:
study chromosomes.
treat Down syndrome.
repair chromosomes.
diagnose genetic diseases.
Answers
study chromosomes.
treat Down syndrome.
repair chromosomes.
diagnose genetic diseases.
Pathogens are microorganisms that can make you sick if you eat them. True or false
Answers
The answer is: True
A sudden, violent expansion of ________ would be considered an explosion.
gas
water
fire
heat
Answers
A tumor is:
unregulated cell division in the body.
regulated cell division in the body.
a lineage of genetically identical individuals or cells.
a mass of cells that does not serve a function in the body.
Answers
Answer: it's kind of options a and d together. A tumor is an abnormal mass doesn't serve any function and it results from an excessive cell division
all of the crops have negative effects on the soil except for the bush beans. why is this?
Answers
Bush beans do not have negative effects on the soil are a type of legume, which means they have the ability to fix nitrogen from the air.
Why are bush beans good for soil?Nitrogen fixation process is beneficial to soil health because it helps to increase the amount of nitrogen available to other plants. Nitrogen is an essential nutrient for plant growth, and it can help to improve the overall health of the soil.
In addition to fixing nitrogen, bush beans also help to improve soil structure. Their roots help to break up compacted soil and improve drainage. This can help to reduce erosion and improve the overall quality of the soil.
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