The band of direct sunlight that stretches across the middle of the earth is called the

answer; the correct answer is desert plants;

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.

condenser is used to focus in the light microscope.