The deepest ocean zone, found in trenches and canyons, is called the hadal zone. Find it on the illustration. The few species that live here include tiny isopods, a type of crustacean related to crabs and shrimp and invertebrates such as sponges and sea cucumbers.
Considering the darkness, depth, cold temperatures, how do these organisms get the food needed to survive?
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D They are dependant on falling parts of dead or decaying plants and animals called marine detritus.

Explanation:

I did it on USAtestprep and got it right.

the answer is d.) homologous; have mammary glands

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.