Select the correct answer from each drop-down menu.
This map shows the level of water stress in different regions of United States.

Region is most prone to water scarcity caused by rises in population. If the population of this region sharply rises, the area will likely experience , which can directly lead to .

The diagram illustrates the activity of vesicles during a cellular process.

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.

Which is an example of a vestigial structure? a. tail of a monkey b. fin of a fish c. flower of a plant d. tailbone of a human