Identify the substances that are involved in a metabolic pathway. A metabolic pathway occurs in two steps. In the first step, substance A is changed into substance B. In this step, substance B works as
-an enzyme
- a substrate
- a product

. In the second step, substance B is changed into substance C. In this step, substance B works as

-an enzyme
- a substrate
- a product

Many animals cannot sweat to maintain a stable body temperature. what is one other way animals can cool down?

In which situations is the principle of cross-cutting relationship useful in determining relative age?

Elephants in the savanna regions of africa dig holes in dried up river beds to reach water lying just below the surface. these holes provide drinking water for other animals as well. so, without the elephants, many animals might otherwise die from lack of water during the dry season. the location in which the elephants live is an example of a/n and the role they play in creating water holes is an example of a a) ecosystem; habitat b) community; niche c) habitat; niche d) niche; habitat