Simple animals are able to supply their cells with nutrients through diffusion and active transport across cell membranes because A. they have complex circulatory systems.

B. their cells are in direct contact with the environment.

C. their cells are not in direct contact with the environment.

D. their blood transports oxygen and other materials through a series of blood vessels.

Question

Biology

Sherlyn Gordon

14 October, 12:10

Simple animals are able to supply their cells with nutrients through diffusion and active transport across cell membranes because A. they have complex circulatory systems.

B. their cells are in direct contact with the environment.

C. their cells are not in direct contact with the environment.

D. their blood transports oxygen and other materials through a series of blood vessels.

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Answers (2)

Know the Answer?

Andreas Moreno · Answer 1

The correct answer that would best fit the given statement above would be option A. Simple animals are able to supply their cells with nutrients through diffusion and active transport across cell membranes because they have complex circulatory systems. Simple animals include sponges, jellies and octopuses. They are multicellular and have complex tissues and organs.

Camilla · Answer 2

This is because of B. Their cells are in direct contact with the environment.