Which of the following is a protein produced by a regulatory gene?
a) operon
b) inducer
c) promoter
d) repressor
e) corepressor

In terms of alternation of generations, the internal parts of the pollen grains of seed-producing plants are most similar to a ) moss sporophyteb) moss gametophyte bearing both male and female gametangiac) fern sporophyted) fern gametophyte bearing only antheridia

Freckles are a dominant trait in humans. both of the girls have the genotype ff for freckles. if either one marries a man with no freckles, what are the chances that their children will have freckles?

Which term describes a normal value for something in the body? a.homeostasis b.set point c.feedback loop d.integration center