Nitrogen is required for protein formation. What is responsible for the bulk of nitrogen fixation? A.
air

B.
animals

C.
bacteria

D.
lightning

Afarmer has applied a pesticide to control a pest population that is affecting her crops. the pest population has reacted as shown below. which best describes the process that the pest population has experienced due to this environmental change? a genetic diversity b natural selection c natural resistance d genetic resistance

What’s this animal (picture is tagged) and where is it most likely to live, rainforest or desert?

The following hormone had their receptors in the cell membrane except a-insulin b-tsh c-gh d- cortisol