Choose correct options from statements below about the enzyme nitrogenase

I. can be found in most bacteria and a few invertebrate animals.
II. contains unique redox centers that contain both Fe and Mo.
III. changes in conformation as a result of ATP hydrolysis.
IV. carries out a reaction that reduces nitrogen to NO.

(a) I, II, III, IV
(b) II, III, IV
(c) II, III
(d) III, IV
(e) IV only

Aparent with freckles is crossed with a parent without freckles. the punnett square shows the possible genotypes and phenotypes of the offspring. which statement accurately describes the probability of phenotypes? a.the offspring are more likely to have freckles. b.the offspring are more likely to have no freckles. c.the likelihood of the offspring having freckles and not having freckles is the same. d.the likelihood of the offspring having freckles and not having freckles cannot be determined.