Benchmark 2 Practice

Front

What trophic level in a food web accumulates the least amount of toxins?

Back

Autotrophs, such as plants, accumulate the least amount of toxins like methylmercury or DDT.

Front

What is a mutation?

Back

A mutation is a change or mistake in DNA.

Front

Which gas is not a waste product of cellular respiration?

Back

Oxygen is not a waste product of cellular respiration.

Front

What process removes carbon from the atmosphere?

Back

Photosynthesis removes carbon from the atmosphere.

Front

What type of cell has all of its genes switched ON?

Back

A stem cell has all of its genes switched ON.

Front

Define autotrophs in the context of a food web.

Back

Autotrophs are organisms that produce their own food, typically through photosynthesis, and are the base of the food web.

Front

What is the role of photosynthesis in the carbon cycle?

Back

Photosynthesis converts carbon dioxide from the atmosphere into organic compounds, thus removing carbon from the atmosphere.

Front

Explain the significance of mutations in evolution.

Back

Mutations introduce genetic variation, which is essential for evolution as it provides raw material for natural selection.

Front

What are the main waste products of cellular respiration?

Back

The main waste products of cellular respiration are carbon dioxide and water.

Front

How do toxins accumulate in food webs?

Back

Toxins accumulate in food webs through a process called biomagnification, where higher trophic levels consume organisms that contain toxins.