Explain why there are gaps in the fossil record

How is the male reproductive system different from other body systems? it isn’t necessary to vital signs. it monitors other body systems, and adjusts if necessary. it transports items from one system to another. it is the only system that produces hormones in the male.

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

Hydroelectric uses moving water to do work such as grinding grains in a mill true or false