Nitrogen is returned to the atmosphere in the process of blank

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)

i do not know and i have a 100 in this class

c

explanation:

a- all cells come from pre-existing cells