Why is carbon essential to all known life on earth?

Which statement best compares aerobic and anaerobic respiration

The largest unit within which gene flow can readily occur is a

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