What are the three main reservoirs of the oxygen cycle? a. atmosphere, the water cycle and rocks b. biosphere, the water cycle and rocks c. atmosphere, the biosphere and the water cycle d. atmosphere, the biosphere and rocks

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

Which is one example of a phenotypic change that is not genetic

Each nephron is made up of capillaries that form the __ sweat glands bladder glomerulus ureter