Which factor has the LEAST effect on the amount of incoming light that strikes an area?
A. Latitude
B. Temperature
C. The tilt of Earth’s axis
D. The amount of cloud cover
E. Season
Answer: B
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The organelle involved in the oxygen-requiring process by which the energy harvested from macromolecules is used to generate ATP is the:
A. chloroplasts. B. ER. C. nucleus. D. lysosome. E. mitochondria.
Which of the following disorders affects the liver?
a. GERD b. hepatitis c. diverticulitis d. IBS e. Crohn’s disease
Which of the following would be an example of natural selection?
A. Mutations change the gene frequency of a population. B. All of the plants on an island are killed by a volcanic eruption. C. In a forest, the taller oak trees produce twice as many acorns as shorter ones. D. Mice that were painted with a white stripe by biologists were eaten by predators more often than those that were not painted.
Which nitrogenous bases are considered pyrimidines?
a. adenine and guanine b. thymine and adenine c. adenine and cytosine d. thymine and cytosine