3. A freshwater ecosystem has a sandy bottom with few rocks. Invertebrates and algae live near the bottom among the rocks. Plankton live at various depths in the water. Different species of fish feed on algae, plankton and other fish. Which of these is an abiotic factor in the ecosystem? A. temperature of the water B. the number of species of algae

C. amount of food available to the fish D. the amount of plankton

Correct

Incorrect answers and why:

According to the cladogram, which organisms have roundworms as a common ancestor?

What is the correct term for an area of rotating currents in an ocean? when ocean currents combine, they create an area of rotating currents called an

Sarah and john are having a discussion on genetic diversity. sarah believes that it happen over a long period of time. john it happens immediately. who is correct? a. sarah is correct because genetic diversity occurs over a long period of time. b. john is correct because genetic diversity occurs immediately. c. both are correct because genetic variation can occur or long period of time. d. neither are correct because genetic diversity occurs over any period of time