EVOLUTION
MODERN THEORY OF EVOLUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Ancient organisms are similar to moderns; yet differ in several ways
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Ancient organisms were a different size compared to modern; otherwise identical
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Ancient and modern species are the exact same
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Ancient and modern species have nothing in common
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Detailed explanation-1: -Fossils document the existence of now-extinct species, showing that different organisms have lived on Earth during different periods of the planet’s history. They can also help scientists reconstruct the evolutionary histories of present-day species.
Detailed explanation-2: -Fossils found in sedimentary rock can be compared to one another and to living organisms to compare similarities and differences.
Detailed explanation-3: -Fossils document the existence of now-extinct past species that are related to present-day species. Direct observation. We can directly observe small-scale evolution in organisms with short lifecycles (e.g., pesticide-resistant insects). Evolution is a key unifying principle in biology.
Detailed explanation-4: -As Darwin concluded, how did ancient organisms compare to modern species? The ancient organisms were similar to modern species, but differed in several ways. Artificial selection has produced a wide variety of crop plants, livestock, and pets.