What is the floor of an aquatic biome called? benthic zone photic zone marine zone aphotic zone

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.

Which beat describes the brain stem

Polar zones are cold and tend to be dry because of a pressure system of cold. low high