what is the role of the beaver in its ecosystems?
a) it is a foundation species and the main source of food for the natural predators of its ecosystems.
b) it is a keystone species that modifies its natural environment by damming streams to form wetlands
c) it is a dominant species, as it has the greatest number of individuals among all the mammalian species of its ecosystem
d) it is an endangered species as it has the least number of individuals among all the mammalian species of its ecosystem

Answers

Answer 1

Answer:

B)

Explanation:


Related Questions

HELP PLEASE I DONT UNDERSTAND

Answers

Answer:

Well i'm not going to tell you the answer but i can help

Explanation:

You have to use this picture and make a argument about these parts of dog they list what are there major movement like how they move

C. Let's say that there are 140 minnows in this lake when the amount of resources in this lake
decreases and the carrying capacity drops from 150 to 100 minnows. What will happen to this
minnow population? Why will this happen?

Answers

The minnow population will decrease to around 100 minnows. This happens because there are not enough resources to support the minnows.

How has vehicle fuel consumption in comparison to miles traveled changed since 1960? What is the likely cause for this change?​

Answers

Answer:

After World War II, economic growth, population growth, rapid suburbanization, and the closing of some public transit systems led to more reliance on personal vehicles for transportation. The number of cars and trucks in the United States increased dramatically, as did the number of highways. One result of the rapid increase of motor vehicles was air pollution, especially in cities, that had serious impacts on public health and the environment.

Find the final amount of money in an account if $9, 100 is deposited at 6.5 % interest compounded

quarterly (every 3 months) and the money is left for 7 years.

Answers

Answer:

you will have a negitative amount

Explanation:

so there is 12 mounths in a year divided by 3 is 4 then times by 7 is 28.

so then 9,100 times .065 is 591.5 that is how much mony goes in the 3 months. Then you do 28 x 591.5 =16562 so you wont have any money left you will actually be in the negitatives.

Hoped that leped:P

What human activity contributes to air pollution?

construction
reforestation
habitat restoration
dam development

Answers

Answer:

construction

Explanation:

because more pollution is produced when the construction is in process and the pollutions are

1.noise pollution

2.air pollution etc...

The human activity that results in air pollution is construction. Please find how construction results in air pollution below.

What is air pollution?

Air pollution is the release of toxic substances called pollutants into the atmosphere.

Pollutants can be released into the atmosphere as a result of anthropogenic or human activities. These activities include:

ConstructionMiningFossil burning

Therefore, the human activity that results in air pollution is construction.

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Hello! I need help pls

Answers

Answer:

I believe it's c hope this helps and I'm sorry if it's wrong

Explanation:

HELP FOR MIDTERM STUDY GUIDE

During photosynthesis, what best describes the role of the compound with the chemical formula C6H12O6?
a. product that is not useful because of its low-energy chemical bonds
b. a product that is useful because of its high-energy chemical bonds
c. a reactant that is useful because of its high-energy chemical bonds
d. either a product or a reactant, depending on whether the cell needs to store energy or
release energy

Answers

It is b because of all the cells that produce the chemical bond

The fish shown here is normally found in a pond but is being studied in an aquarium. The amount of water and salt intake and excretion is measured as the fish maintains homeostasis. What scientific
question is most likely being asked based on the information in the model?

Answers

Based on the information in the question, we can infer that the question being asked is most likely "What mechanisms do fish use to maintain homeostasis in salt-water environments?".

What is homeostasis?Homeostasis is a series of regulatory processes by which an organism maintains core values (or range of values) necessary for everyday life.

How to test the questionThe question is in the form of a hypothesis.This means that the scientist must first propose a possible solution to the question.Then, the scientist will make observations based on this question. In this case, it would seem the scientist has placed the fish into an environment that differs from its natural habitat, in order to observe how the fish maintains homeostasis.

Therefore, we can infer that the most likely question being asked is in regards to the way in which fish maintain homeostasis.

To learn more about homeostasis visit:

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Answer:

Im not sure but from the answer is D)

Explanation:

Since the experient is about salt, a water that is hypertonic, thus A and C are out and the question states that they are testing it on a pond, meaning it is in fresh water. Thus B are out and there is only D in this question

Which of the following cognitive skills have not been displayed by animals? A. Using tools B. Forming concepts C. Transmitting culture D. Using syntax.

Answers

A cognitive skill which have not been displayed by animals is: D. Using syntax.

A cognitive skill is also referred to as cognitive ability and it can be defined as a brain-based skill that is required by a living organism for the manipulation of information, acquisition of knowledge, reasoning and performance of various tasks from the simplest to the most complex.

Some examples of the cognitive skills that have been displayed by animals include the following:

The use of tools.The transmission of culture.The formation of concepts.

However, animals do not speak words or have a spoken language and as such they do not have the cognitive skill to use syntax.

Read more: https://brainly.com/question/18428487

Answer:

It’s D

Explanation:

On edge 2022

Answer these questions about making a yogurt.

1) why is the milk pasteurized at the start of the process?

2) Why is the mixture of milk and bacteria incubated at 45 °C?

3) what causes the milk to thicken?

4) why does fermentation eventually stop?

5) Explain how making yogurt is a way of preserving the nutrients from milk.

Answers

It should be noted that milk is pasteurized at the start of the process in order to kill bacteria.

The mixture of milk and bacteria is incubated at 45 °C to kill the bacteria.

The drop in pH causes milk to thicken. Fermentation is stopped when the alcohol concentration rises to a point where it kills the yeast cells.

Lastly, making yogurt is a way of preserving the nutrients from milk as the bacteria ferment the milk thereby turning the lactose sugars to lactic acids.

Learn more about yoghurt on:

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Which elements atoms have 2 electrons in the first energy level and 4 electrons in the second energy level?
A. Carbon
B. Nitrogen
C. Helium
D. None of the above

Answers

Answer:

Carbon

Explanation:

Carbon has 2 electrons in the first energy level and 4 electrons in the third energy level.

Explain the difference between afferent and efferent neurons.

will give brainliest

Answers

Answer:

Neurons that receive information from our sensory organs (e.g. eye, skin) and transmit this input to the central nervous system are called afferent neurons.

Neurons that send impulses from the central nervous system to your limbs and organs are called efferent neurons.

Explanation:

Hope this helps you !!

This model of the cell cycle includes two arrows that each represent a process in the cycle.


What do the two arrows represent?

Answers

Answer:

the order in which it is preformed.. sorry if in wrong

the salivary glands under the tongue are described as

Answers

Answer:

A tissue in our mouth that produces saliva to help swallow food! :)

Organ system:Put the following in order from smallest to largest:
Cells
Organs
Tissues

Answers

Cells, tissues, organs

Answer:

Cell, Tissue, Organ

Explanation:

how long does it take for food to be digested and pooped out?

Answers

Answer:

The food you've eaten goes down your oesophagus to your stomach, then to your small intestine, large intestine, and out out the anus during digestion, which can take anywhere from 24 to 72 hours.

Explanation:

Answer:

Lol going to copy his answer for points

Explanation:

The food you've eaten goes down your esophagus to your stomach, then to your small intestine, large intestine, and out out the anus during digestion, which can take anywhere from 24 to 72 hours.

the reproductive organ that produces gametes is called a

Answers

Gonads are sex organs that produce gametes. Male gonads are the testes, which produce sperm and male sex hormones. Female gonads are the ovaries, which produce eggs (ova) and female sex hormones.

Which energy technology is more sustainable long term?

Answers

Answer:

Wind power

Harnessing power from the wind is one of the cleanest and most sustainable ways to generate electricity as it produces no toxic pollution or global warming emissions. Wind is also abundant, inexhaustible, and affordable, which makes it a viable and large-scale alternative to fossil fuels.

Explanation:

I hope it's help :)

Answer:

Wind power

Explanation:

getting power from the wind is one of the cleanest and most sustainable ways to generate electricity.

2. Which organisms make carbon dioxide in the
atmosphere available for all living organisms in
the ecosystem?

Answers

Answer:

land plants, bacteria, and algae

Explanation:

________________ translate the mRNA message into proteins, which may go into the cytoplasm, or enter the ER to be modified.
help!!!

Answers

Answer:

ribosomes

Explanation:

ribosomes translate RNA into protein

(please help ASAP!) Which statement about evolution is accurate?(1 point)
a. DNA is the only extant evidence supporting the theory of evolution.
b. Animals, plants, and microbes have their own separate, unrelated ancestries.
c. Living things have adapted and changed over time for specific, discoverable reasons.
d. Scientists no longer study evolution because it has been proven.

Answers

Answer:

C: Living things have adapted and changed over time for specific discoverable reasons.

Explanation:

Answer:

C. Living things have adapted and changed over time for specific, discoverable reasons.

Explanation:

Survival of the fittest

It is undefined law of the nature that one has to change and adapt to its environment in order to survive. Humans are the prime examples of the process as with time we have directed our actions to run parallel with the changing environment and things around us in order to survive.

Learn more about Survival of the fittest here

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#SPJ2

What is it called when part of a cell membrane closes around a molecule to allow the molecule to enter the cell?
A. Diffusion
B. Passive transport
C. Exocytosis
D. Endocytosis

Answers

Answer:

Endocytosis.

Explanation:

In endocytosis, the cell membrane forms a cup-like sac around the molecule, the two lips of the cup meet around the molecule so that a vesicle is formed by the separation of that part of the cell membrane.

D. Endocytosis
Exocytosis would be allowing a molecule out of the cell

Which statement best describes the use of a catalyst in a fuel cell? It reduces waste. It lowers energy requirements. It reduces toxic exhaust. It increases reaction rates.

Answers

The statement that best describes the use of a catalyst in a fuel cell is : ( D ) It increases reaction rate

A catalyst in a fuel cell speeds up/facilitates the rate of reaction of oxygen and hydrogen especially at the oxygen electrode of the fuel cell.

Generally catalyst is any substance that increases the rate of a chemical reaction without been used up in the process, while lowering the activation energy required to kickoff the reaction.

Hence we can conclude that the statement that best describes the use of a catalyst is that it increases the reaction rate

Learn more : https://brainly.com/question/3818781

Answer:

The answer is D

Explanation:

EDGE2022

Which ratio of surface area to volume is most efficient for a cell?

Answers

Answer:

Smaller single-celled organisms have a high surface area to volume ratio, which allows them to rely on oxygen and material diffusing into the cell (and wastes diffusing out) in order to survive. The higher the surface area to volume ratio they have, the more effective this process can be.

Hope that helps. x

Explain why most nerve cells have a myelin sheath (2 marks)​

Answers

Answer:

This allows electrical impulses to travel efficiently and quickly along the cells.

PLEASE HELP WILL GIVE BRAINLIST!

this year there were 32 ants born in an ant hive. Due to the new pesticide that was used in the area, 32 died. With an overall population of 1000 ants in the hive, what is the change in population? Do you have a positive, negative, or zero change in population? How many members are in the new population?

Answer should contain the following information: work for calculating the change in population positive, negative, or zero change in population. Work for calculating the new population.

Answers

Answer:

0 change in population. I think.

Explanation:

first we are adding 32 ants to the total because 32 ants were born so 1000+32 = 1032.

Next we are subtracting 32 ants from the new total because a pesticinde was used in the area. So 1032 - 32 is 1000. 1000 was the original total so there was not a decrease in popualtion or an increase.

What is XX and XY? And which are their differences?

Answers

Answer:

chromosomes

Explanation:

the diefference is that one is combination of female genes and the other a combination of female with male genes

Passive transport move molecules without

Answers

Answer:

Passive transport moves molecules without energy

Explanation: hope this helps plz make brainlist

1
Which of the following is BENEFIT of using natural fertilizer?
O its cost effective (cheap)
O you know exactly what nutrients/minerals are in it
it adds to the soil and makes it better long term
O it could lead to e. coli outbreaks

Answers

The effect of natural fertilization is adds to the soil and make it better long term

after a macrophage ingests a pathogen, what does it do to the antigens?

Answers

Explanation:

After the macrophage ingests a pathogen, it creates an antigen on the surface of themselves, which signals the antigen to a corresponding helper T cell

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