Why is nitrogen fixation important to all organisms?

it breaks down dead organisms.

it converts nitrogen gas into a usable form for plants.

it converts energy from the sun into a usable form for plants.

it produces much of earth's oxygen.

Which conditions are necessary for natural selection to occur? select all of the answers that apply. a. inheritable adaptations vary among individuals. b. the population size is increasing. c. more individuals are born than can survive. d. fitness varies among individuals. e. the environment changes suddenly and drastically.

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

Pl which diagram illustrates prophase?