Environmental Science 15th Edition by Scott Spoolman,Tyler Miller

تمرين 10

What is the key concept for this section? What percentage of the earth's surface is covered with ocean water? What is an aquatic life zone ? Distinguish between a saltwater (marine) life zone and a freshwater life zone , and give two examples of each. List five factors that determine the types and numbers of organisms found in the layers of aquatic life zones.