AP BIOLOGY

Detailed explanation-1: -Freshwater habitats include ponds, lakes, rivers, and streams, while marine habitats include the ocean and salty seas.

Detailed explanation-2: -Wetlands are not considered freshwater ecosystems as there are some, such as salt marshes, that have high salt concentrations-these support different species of animals, such as shrimp, shellfish, and various grasses.

Detailed explanation-3: -Glaciers, rivers and wells are sources of freshwater. Oceans and seas are sources of saline water and not freshwater.

Detailed explanation-4: -The freshwater ecosystem is mainly divided into three types based on its region – Lotic, lentic, and wetland freshwater ecosystem.