Question

1. organisms that float near the surface of water mark only one oval. a. salt marsh b. corals c. benthic zone d. runoff e. plankton f. oxygen g. flood control h. mangrove swamps i. eutrophic lake j. over fishing 7. 3. marine ecosystem dominated by trees with stilt - like roots mark only one oval. a. salt marsh b. corals c. benthic zone d. runoff e. plankton f. oxygen g. flood control h. mangrove swamps i. eutrophic lake j. over fishing 8. 4. factor that determines where aquatic organisms live * mark only one oval. a. salt marsh b. corals c. benthic zone d. runoff e. plankton f. oxygen g. flood control h. mangrove swamps i. eutrophic lake j. over fishing

Explanation:

• Question 2: Plankton are organisms that float near the surface of water. They are too small or weak to swim against currents.
• Question 3: Mangrove swamps are marine ecosystems dominated by trees with stilt - like roots which help them in the intertidal zones.
• Question 4: Oxygen is a crucial factor that determines where aquatic organisms live as different organisms have different oxygen requirements.

Answer:

1. e. plankton
2. h. mangrove swamps
3. f. oxygen