(Question)
Q: A comet striking the earth may have caused mass extinction, this would have decreased sunlight, which would have effected what plant process reducing food? Read this paragraph and choose the correct option from the provided answers: At the end of the Cretaceous Period, or 65 million years ago, all dinosaurs (except those which led to birds) went extinct. Some scientists believe a possible cause is a collision between the Earth and a comet or asteroid. The collision could have caused tidal waves, changed the climate, and reduced sunlight by 10-20%. A decrease in photosynthesis would have resulted in less plant food, leading to the extinction of the dinosaurs. Choices: - fertilization - decomposition - glycolysis - photosynthesis A:
(Answer)
photosynthesis

(Question)
Q: What are mutant versions of normal genes called? Read this paragraph and choose the correct option from the provided answers: Choices: - antecedent - oncogenes - anti-oncogenes - extinction - oncogenes - proto-oncogenes A:
(Answer)
proto-oncogenes

(Question)
Q: During interphase, the cell undergoes normal growth processes while also preparing for what, by accumulating energy and building blocks of dna? Read this paragraph and choose the correct option from the provided answers: The population is an important unit in ecology as well as other biological sciences. How is a population defined, and what are the strengths and weaknesses of this definition? Are there some species that at certain times or places are not in populations?. Choices: - proteins division - chromosome division - technology division - cell division A:
(Answer)
cell division