the seed's food source will be used up by the time the new plant developsleaves. why does the plant no longer need the cotyleddon once the leaves are formed?

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.

Based on the law of dominance, we would expect percent of the offspring from this cross to have large teeth.

What maintain homeostasis when a persons internal body temperature is 97.5°f