Enzymes function best at the blank pH level

Honestly it really varies. Some enzymes prefer more extreme environments; however, most enzymes' optimum pH is neutral or close to neutral, which is the pH of 7.

it's the release of intestinal gas, which forms as a result of digesting food. when partially digested carbs reach the colon, bacteria convert part of that food into hydrogen and carbon dioxide gasses. you cant stop the stink, its a gas that comes naturally.

explanation:

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.