Metabolic pathways a. control the flow of energy b. control enzyme activity c. can be linear or branched out d. all of the above

The answer is B , i hope this helps

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.

answer; coat color for blending in with dry grass;