What is the defining abiotic factor of deserts? a) the amount of rainfall b) the amount of soil c) the amount of air d) the amount of sand

Photosynthesis uses co2 and cellular respiration produces co2. we call the point when the two processes are in balance--when there is no net production of co2--the compensation point. how might you limit one of the processes in order to achieve a compensation point?

What function does the limb sever in each animal? how are the limb bones of the four animals similar? based on these similarities what can be inferred about the evolution of the four animals.

Identify the structure in organisms that do not have kidneys that is adapted to regulate water balance