The pedigree below is tracing the expression of recessive trait for generations I & II. Both parents carry the trait but only one presents the trait. Based on the information shown in the pedigree, what is the genotype for individual I-1?

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.

How are fossils used to date organisms?

What do all of the above organisms have in common