The principle difference between point source and nonpoint source water pollution is
a. whether the pollution is organic or inorganic
b. the number of sources of pollution
C. the amount of pollution
d whether it is from commercial or agricultural sources
Please select the best answer from the choices provided

An organ system consists of a group of organs that performs specific functions necessary for the survival of an organism. humans have eleven different organ systems: integumentary, skeletal, muscular, nervous, endocrine, circulatory, lymphatic, respiratory, digestive, urinary, and reproductive. discuss the function of neurons, the brain and the spinal cord within the human nervous system while explaining the interrelationship of each organ.

Why are fossils not found in igneous rocks? igneous rocks are made from cooling of lava or magma. igneous rocks are found too deep underground. igneous rocks are too dark in color to contain fossils. igneous rocks are too dense to contain fossils.

Which of the following best describes the relationship between glucose and complex molecules such as hormones?