The following image shows the Houma Logus chromosomes with the human female. Which scenario is most likely to have occurred to result in nondisjunction event was chromosome pair 21

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.

What does it mean for a cell membrane to be selectively permable

This is one of the five kingdoms in the older biological succession. organisms in this kingdom are prokaryotic