What is the variable a scientist changes on purpose?

A. Control group

B. Constant variable

C. Dependent variable

D. Independent variable

Ohio and Ukiah, California, lie on the same latitude. However, Ukiah has a moderate climate, while Ohio has an extreme climate. What could the reason be for the difference in climate?

Mention four organs of the respiratory system

Which of the following is an example of conformity? 1 - John loses interest in activities he used to enjoy and has trouble sleeping. 2 - Malcolm acts, dresses, and speaks like the teens he hangs out with at school.

Christina and her friends are discussing the theory of evolution. One friend states that there is no evidence to support the theory of evolution. Which line of evidence could Christina offer to contradict her friend's statement? A.

What happens to an enzyme after a biochemical reaction?

Coal deposits were formed from? A. Plant life in ancient B. Ancient plankton and marine life C. Freshwater organisms from the last 100,000 years D. Modern plants and animals

According to the Hardy-Weinberg principals, which of the following can prohibit genetic equilibrium?

Rickettsia are obligate intracellular parasites that are transmitted by arthropods. In which of the following places would you most likely find the parasites living in the host organism during the course of infection? A.

How are viruses able to move between species?

The process by which a population becomes better suited to its environment is known as?