how is nitrogen obtained by animals?

a. they breathed it in from the air.
b. they get it from the soil.
c. they get it from eating plants.
d. they produce it in their chloroplasts.

What does gradualism and punctuated equilibrium have in common

Which group is noted for the independence of gametophyte and sporophyte generations from each other? a) ferns b) mosses, hornworts, and liverworts c) charophytes d) angiosperms e) gymnosperms

Describe how alleles and genes are related