Acell can only grow so large in size, because
a. it's surface to volume ratio decreases as the cell becomes larger.
b. it's ability to exchange materials would happen more quickly as the cell grows.
c. it's ability to exchange materials is affected by a growing surface to volume ratio.
d. it's surface to volume ratio decreases as the cell becomes smaller.

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.

You can tell from this karyotype that the individual is female because the karyotype has two chromosomes labeled

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