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Why is bulk flow a necessary condition of complex multicellularity?
a. Organisms exhibiting complex multicellularity are large and have cells/tissues that are not in contact with their environment.
b. Systems that can overcome the limits of diffusion must evolve for basic physiologic processes to occur.
c. Complex multicellularity is related to the increase in oxygen in the environment.
d. Because bulk flow systems are only related to the delivery of oxygen to tissues, higher environmental oxygen selected for individuals with bulk flow systems.
e. Bulk flow is necessary to move large amounts of liquid through the organism, depending on physiologic needs.
f. The tissues can all receive necessary nutrients from the environment, but bulk flow speeds the rate of diffusion.
g. Complex multicellularity reflects cell adhesion between cells, and this cannot happen without bulk flow of signaling molecules from the environment.

Answer :

btunie33

Answer:

Answer: A and B.

Explanation:

Bulk flow can be described or explained as the movement of molecules or fluids through organisms, i.e plants and animals due to pressure differences. It can also be explained as the combined movement of water and solute due to pressure gradients.

Examples of bulk flow include , the movement of phloem sap in plant, circulatory system in animals.

The importance of bulk flow is that, it makes the movement of molecules possible at the pressure gradient that is beyond that of diffusion.

Note that, bulk flow is also known as the mass transfer or mass flow.

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