Which observation suggested to sutherland the involvement of a second messenger in epinephrine's effect on liver cells?

One of the purposes of transcription is to produce a sequence of bases that

Cells destroy body cells infected by a virus or bacteria. killer t t memory t none of the above

Which of the following is most likely the result of an organism having lipids in its body a) water cannot be absorbed through the surface of a leaf b)human eats fruits to get a quick source of energy c) a sheep sleeps for more hours in the winter d) a warm river is filled with fish and algae