Mass graves are often the result of

local criminals
genocide
world politics
taphonomy

Where is energy trapped inside the organelle chlorophyll

What would happen to the nutrients in an ecosystem if decomposers, such as bacteria, didn’t exist there?

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.