On a food web diagram, one type of fish is labeled as a primary consumer, and another is labeled as a secondary consumer. what is the reason for this difference?

secondary consumers are higher in the food web because they eat primary consumers

primary consumers are smaller fish but are at the same level in the food web as secondary consumers

secondary consumers eat primary producers so they are lower in the food web

primary consumers eat secondary consumers so they are lower in the food web

Animal bodies (and even plant bodies for that matter) are complex enough that life couldn't exist without enzymes. enzymes are usually large, complex biological catalysts that are expensive to make. enzymes speed up the rate of chemical reactions without being used up during the reaction (they can be reused many times). they are highly specific in the reactions they regulate. knowing what enzymes are and how they function, why does this explain why complex life forms could not exist if there were no enzymes.

Which statement is true for bacteria a. bacteria have complex internal structures b. all bacteria are spiral in shape c. all bacteria cause disease in animals d. bacteria break down some foods

The disease osteoporosis often results from insufficient intake of dietary calcium salts. of the three samples of bone you tested in exercise 7-2, which is the most similar to the bones in osteoporosis