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9 May, 22:25

Evolutionary theory predicts that species are related, not independent. Four of the following examples provide support for this prediction, but one is irrelevant. Which of examples listed below does not support the claim that species are related? A. Many dinosaurs and other organisms went extinct following a huge asteroid impact at the end of the Cretaceous. B. The endostyle of lancelets (invertebrate chordates) and the thyroid gland of vertebrates develop similarly, and both produce iodinated proteins. C. All prokaryotes and eukaryotes use DNA to carry their genetic information. D. Ground squirrel species found on the North and South sides of the Grand Canyon are very similar to each other. E. Before synthetic insulin was available, diabetics used injections of purified pig insulin to manage their disease.

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  1. 10 May, 00:30
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    Answer: A. Many dinosaurs and other organisms went extinct following a huge asteroid impact at the end of the Cretaceous.

    Explanation: Evolutionary theory tries to show that related species can be traced to a common and related ancestors. This phenomenon can be seen in the different adaptive mechanisms, reproductive structures. According to Charles Darwin, organisms evolved specific morphological and anatomical features from their earlier ancestors as can be seen in the Homo species which has evolved from several ancestors such as Homo habilis etc.
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