What is the optimum ph for catalase activity? a) 3.0 b) 7.0 c) 10.0 d) 13.0

Catalase is a common enzyme very important in reproductive reactions and is found in almost all living organisms exposed to oxygen.   There are different catalase activities,  pH optimum of which between 4 and 11 depending on the species. However, the optimum pH for human catalase is approximately 7.0 (letter C). 

the father in the first generation probably had the recessive colorblind trait in his x chromosome. if he and his wife both had the colorblind trait, even if she had 1 recessive and 1 dominant, then that trait would be passed on to their kids.

(since you didn't attach the family tree this is just an assumption)

the answer is "a.) well–developed vascular system."

explanation: