What could happen to the target cells in an animal that lack receptors for local regulators?
A- They could develop normally in response to neurotransmitters instead.
B- Hormones would not be able to interact with target cells.
C- They could divide but never reach full size.
D- They would not be able to multiply in response to growth factors from nearby cells.
E- They could compensate by receiving nutrients via an a factor.
Answer: D