UCF Biology Exit Exam Practice Questions and answers DNA sequences in many human genes are very similar to the sequences of corresponding genes in chimpanzees. The most likely explanation for this result is that - answer Humans and chimpanzees share a relatively recent common ancestor It has been observed that organisms on islands are different from, but closely related to, similar forms found on the nearest continent. This is taken as evidence that - answer Island forms and mainland forms descended from common ancestors Of the following anatomical structures, which is homologous to the wing of a bird? - answer Flipper of a cetacean In Darwin's thinking, the more closely related two different organisms are, the - answer More recently they share a common ancestor Charles Darwin was the first person to propose - answer A mechanism for evolution that was supported by evidence Which naturalist synthesized a concept of natural selection independently of Darwin? - answer Alfred Wallace 1 / 2
Darwin's mechanism of natural selection required long time spans in order to modify species. From whom did Darwin get the concept of Earth's ancient age? - answer Charles Lyell Tropical grasslands with scattered trees are known as - answer Savannas Which biome is able to support many large animals despite receiving moderate amounts of rainfall? - answer Savanna Which of the following organisms is the most likely candidate for geographic isolation? - answer Land snail The main reason polar regions are cooler than the equator is because - answer Sunlight strikes the poles at a lower angle Which of the following is responsible for the summer and winter stratification of deep temeprate lakes? - answer Water is densest at 4 celsius In temperate lakes, the surface water is replenished with nutrients during turnovers that occur in the - answer Autumn and spring Which of the following abiotic factors has the greatest influence on the metabolic rates of plants and animals? - answer Temperature
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