Annelids and arthropods were once considered closely related. Some juvenile forms of arthropods resemble annelids (maggots and caterpillars). However, modern classification schemes separate them into distant groups. What feature suggests a fundamental difference between the two groups

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.

Were does condensation occur? a) hydroshereb) lithosherec) boishered) atmosphere

The cluster of developing cells from conception until birth is called an