Question

Which organism has cells that respond in individual areas, but the cells are not connected to a nervous system?

A.
sponge

B.
clam

C.
shark

D.
earthworm

Answer 1

@Secret-Ninja

Answer 2

Sponges would be your answer. Sponges have no cells connected to each other by synaptic junctions, that is, no neurons, and therefore no nervous system. They do, however, have homologs of many genes that play key roles in synaptic function. Do you understand?

Answer 3

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Answer 4

Yes thank you again.

Answer 5

No problem. :)