Agenetic factor that blocks another genetic factor

not too sure but maybe in the hot springs.

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.

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.