Which type of anatomic structure are bird wings and butterfly wings when compared to each other?
a. vestigial
b. homologous
c. analogous
d. heterologous

In what for do plants utilize nitrogen? why do they need nitrogen?

20. in humans, freckles are dominant to no freckles. trey has no freckles and his wife anna grace has freckles, but her dad doesn't. they want to know what percentage of their kids would look like trey. show a punnett square to support your answer.

Why is it to call the calvin cycle the light independent reactions vs the dark reactions