Answer:
C. levels of specific hormones
Answer:
A
Explanation: Ex: heavy fur coat great in Alaska, bad in Florida
Not B: organizms can learn behaviors but adaptation is biological.
Not C. Answer is not for basic biology.
Not D: Competition varies under factors such as environment.
Answer:
petals of a falling flower are exerting force of gravity
Explanation:
Group cells that have the same function are tissue
