Which Statement About Signaling Within Organisms Is True

Which statement about signaling within organisms is true?

A) Intercellular communication occurs in bacteria using hormones.
B) Sponges lack both a nervous system and chemical signaling among cells.
C) Over the course of evolution, the structures of chemical signals have been conserved, but their functions have evolved.
D) Plants lack both a nervous system and chemical signaling among cells.
E) Particular hormones are typically confined to specific taxa.

Correct Answer:

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