How do the human nervous system and endocrine system interact in response to a stimulus?
A. The endocrine system signals the nervous system to send out
nerve impulses in response to a stimulus.
B. The nervous system signals the endocrine system to release
hormones in response to a stimulus.
O C. The nervous system responds to a stimulus, and the endocrine
system returns the body to a relaxed state.
D. The endocrine system responds to a stimulus, and the nervous
system returns the body to a relaxed state.

the answer is d (apex) good luck : ))

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.