biologists study how nutrients and energy move among organisms and through water, soil, and air. which level of ecological study is this?

Consider the following planned experiment. factor experimental group control group light exposure tots of sun tots of sun amount of water weekly weekly type of soil nutrient rich nutrient rich size of pot large which variable is being tested in this experiment? small a. size of pot b. type of soil c. light exposure d. amount of water

The image shows a group of fish. the type of social behavior shown in the image is called

Which is essential for finding the biomass of spinach