Question

part a
even though biology is a broad field of study, ________ serves as a central theme that unifies all of biology.
view available hint(s)
evolution
response to the environment
order
regulation

Explanation:

Evolution is the unifying theme in biology as it explains the diversity and unity of life forms through processes like natural selection and genetic variation. Other options like response to the environment, order, and regulation are important aspects but not central unifying themes.

Answer:

A. evolution