Populations and the Environment

Question 1

Check all of the items that are cycled through the biosphere in biogeochemical cycles.

Revolt · Accepted Answer

water; matter; nitrogen; phosphorus; carbon

Question 2

The animal releases the carbon dioxide back into the atmosphere during respiration.

Revolt · Accepted Answer

Step three

Question 3

The animal eats a plant and uses its carbohydrates for energy.

Revolt · Accepted Answer

Step two

Question 4

The cycle repeats when the carbon stored in the atmosphere as carbon dioxide gas is taken in.

Revolt · Accepted Answer

Step four

Question 5

Identify the importance of water. Check all that apply.

Revolt · Accepted Answer

It ensures life on Earth can exist.; It is used by plants for photosynthesis.; It is the main component of many biological components, including blood.

Question 6

Identify the importance of carbon. Check all that apply.

Revolt · Accepted Answer

It ensures life on Earth can exist.; It is a part of all organic compounds, including carbohydrates and nucleic acids.; It is found in every living thing.

Question 7

78% of Earth’s atmosphere contains this nutrient in the form of gas. All living things require this nutrient to make proteins, and it is found in the waste products of many living things.

Revolt · Accepted Answer

Nitrogen

Question 8

This nutrient is not abundant, but it is essential to life. It is part of DNA and RNA and a component of bones and cell membranes.

Revolt · Accepted Answer

Phosphorus

Populations and the Environment Answers

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