Receives deoxygenated blood
from the body

During endocytosis, cells expel what they don't need take in what they need shrink due to loss of water

Consider the model of the oxygen cycle on earth. the majority of earth's oxygen reservoirs are found in the a) atmosphere. b) biosphere. c) hydrosphere. d) lithosphere.

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above