Describe a way you could model seafloor spreading

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.

The probability of producing a normal child by two parents who are carriers for an autosomal recessive disorder is

Identify two examples of chemical reactions that you have encountered during the last week. identify an exothermic and endothermic reaction. explain.