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BIO 100 Exam 1 2025 Questions and Answers Eagles and other top predators are most severely affected by pesticides like DDT because they - ....ANSWER ...-Consume prey in which pesticides are concentrated. Why are food chains restricted to five or fewer trophic levels? - ....ANSWER ...-All of these choices are correct: - Because insufficient energy is available to support a large enough breeding population at higher trophic levels than these. - The loss of usable energy at each trophic level means that many more individuals being eaten are needed to support a smaller number of creatures doing the eating. - Energy transfer is relatively inefficient. - The total energy stores is less at each level as you move up the food chain. Which reproductive process will result in the greatest genetic variation within a population? - ....ANSWER ...-Sexual reproduction If you spend a summer in the White Mountains of eastern Arizona observing the mating behavior of Mexican gray wolves and then come up with a tentative explanation for their behavior which you test with an experiment, what kind of science are you performing? ....ANSWER ...-Hypothesis-based science …FOR STUDENTS ONLY…©️2025 ALL RIGHTS RESERVED… 1