how did the ice age affect the landscape of Snowdonia? Explain whether this process happened over a short or a long period of time.

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.

Explain why the plants cortex would serve as the best food source for animals

To determine if a particular plant is homozygous or heterozygous, you would have to test cross with a