Which organisms convert nitrogen into a form that is usable by humans

Differentiation of cells changes the nucleic information. true false

15 ! come and answer! a(n) is the general term for an infectious disease that has spread across a city, region, or country.

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.