the relationship between the number of organisms in the food chain and the size of the individual organisms within each level of the food chain is

How energy flows through each level in this energy pyramid. is all the matter and energy from one level transferred to the next level?

Match each description of an object’s motion with the position-time graph that represents it. not moving moving with constant speed speeding up slowing down

What is point source pollution of an aquatic ecosystem? a) pollution of freshwater sources b) pollution from many sources that combine into one c) pollution that occurs over a wide area; water that runs off from fields, parking lots, and other land surfaces d) pollution that can easily be identified with a single discharge source, such as an open pipe which drains into a body of water