During the process of mitosis, which event occurs to each chromosome in the cell nucleus? Each chromosome breaks apart into individual pieces, called genes
Each chromosome merges with another chromosome forming a tetrad
Each chromosome is pulled apart, forming identical chromatids
Each chromosome is pulled apart, forming two nonidentical chromatids

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 anatomical similarities, to which modern animal is dr. digger’s creature most closely related?

Did you know that a blue wales tongue weighs more than an elephant?