Melatonin is secreted by
A. the hypothalamus during the day
B. the pineal gland during the night
C. the autonomic nervous system during the winter
D. the thyroid gland during cold seasons

The answer would be B, the pineal gland during the night.

Explanation:

The secretion of melatonin is triggered by darkness, therefore produced during the night.

the genotypes would be 50% bb and 50% bb

the phenotypes would be 50% brown and 50% white. hope this : )

its 42

i say its d?