How does eating contribute to the flow of energy in an ecosystem? Carbon bonds in food are broken, which releases energy. Weathering breaks down rocks into chemicals like sulfur and nitrogen. Consumers make food using light energy from the sun. Energy is absorbed as heat when plants make food.

Assume that a student is given two different models of bacteria, with one model consisting of big bacteria and the other consisting of small bacteria. how can the student demonstate the theory of endosymbiosis using the models

Which of the following systems in absorbing oxygen and releases carbon dioxide

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.