How is urea removed from the body? A as insoluble waste

B by being destroyed in the liver

C in expired air

D in solution

Some birds look for food near cattle and other livestock. the movement of the cattle churns up the ground, making insects available to the birds. the cattle appear to be unaffected by the presence of the birds. what kind of relationship exists between the birds and the cattle? o a. parasitism o b. commensalism o c. predation o d. mutualism

All other things being equal the size of a population will decrease if

Earth is tilted on its axis. which of these would not exist if earth had no tilt?