Which is the main reason soil in agricultural ecosystems loses its nutrient content over time? a. Crop plants containing soil nutrients are removed from the system each year b. Desertification from overuse causes the rapid loss of nutrients c. Nutrients blow away whenever wind erosion rates are high d. Irrigation leaches nutrients out of the soil

Study the picture of the ocean. which is the best example of an organism’s niche shown in the picture? a. the environment contains several of the same species of coral. b. the shallow area of the ocean meets the needs of the coral and the fish. c. the ocean has fish and coral that live in the same area. d. the coral take in food from the water and provide shelter for the fish.

What is the most common structure of volcanoes?

Kate is studying the transformation from unicellular to multicellular organisms. which metaphor is the most appropriate to apply to the map of the timeline.