Which type of lipid acts as a chemical messenger? A. Adipose tissue B. Cholesteral C. Testosterone D. beeswax

Fresh water found in soil and rock layers below Earth's surface is called deep water.

What happens to the warm air when it overtakes the cold air?

If you wanted to get the most accurate weather report from your local news, which forecast should you listen to?

Which of the following is an example of mutualism? A. Bacteria live in root nodules of a plant, processing nitrogen into ammonia for the plant and receiving protection and a steady food supply in return. B.

Permafrost characterizes the biome called? A. taiga B. boreal forest C. savanna D. tundra

What type of molecule that can be found in living things lacks carbon atoms

The major weakness of the job descriptive index (jdi) is that

What word refers to traces of an organism that existed in the past?

Which of the following would likely extend the Earth's supply of a nonrenewable resource?

How many growing seasons do plants with herbaceous stems usually survive?