EVOLUTION
EVOLUTION OF A POPULATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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they show that ancient species share similarities with species now on Eearth
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they show evidence of species that are now extinct
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they are the primary source of evidence of natural selection
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fossils reveal that many species have remained unchanged for millions of years
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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 are the preserved remains or traces of animals, plants, and other organisms from the past. Fossils are important evidence for evolution because they show that life on earth was once different from life found on earth today.
Detailed explanation-3: -Fossil remains have been found in rocks of all ages. Fossils of the simplest organisms are found in the oldest rocks, and fossils of more complex organisms in the newest rocks. This supports Darwin’s theory of evolution, which states that simple life forms gradually evolved into more complex ones.
Detailed explanation-4: -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-5: -Comparing sections of DNA in difference species has shown that even organisms that seem to be different, actually have large sections of identical DNA. Embryology shows the similarities that organisms have at a very early stage of development.