How are hormones levels regulated?
A. By nerve impulses
B. By a feedback loop
C. By sexual reproduction
D. by involuntary

If you want to change the pitch of a sound, you have to change the question 7 options: volume speed amplitude frequency

How do tides affect the organisms living in intertidal zones? a. no organisms live in intertidal zones due to the tumultuous environment. b. the mechanical forces of the waves keeps the organisms clean. c. only plants live in intertidal zones because the animals float away with the waves and never return. d. the mechanical forces of the waves can dislodge the organisms from their habitat.

Which identifies the main purpose of biological taxonomy?