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Question

Read the passage and answer the following question.
Some dinosaur bones were discovered fairly recently that still contained significant amounts of the protein collagen in a non-fossilized form. Enough material was available to determine its amino-acid sequence. This allowed researchers to compare its sequence with the sequences of collagen from currently existing animals.
Identify the organisms that are closely resemble to the dinosaur sequence?

A
Birds
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B
Lizards
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C
Amphibians
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D
Rodents
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E
Fish
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Solution

The correct option is A Birds
Scientists working across a variety of disciplines have discovered evidence of common descent among the living organisms on earth. This evidence which constructs a theoretical framework on which evolutionary theory rests demonstrates the natural processes of earth's biodiversity. These studies are based on fossil studies and comparison of the DNA genetic sequences thereby revealing phylogenetically closer organisms. A protein is a chain of amino acids and the functional end-product of a gene. Studies by evolutionary scientists involve the comparative analysis of both DNA and protein sequences and comparing the same type of gene or protein sequence between organisms helps to determine the closeness of a relation. According to their studies, two organisms are considered closely related if they share a high percentage of amino acid sequence similarity for a certain protein. The recent studies however, bring to light the close resemblance of Birds to the extinct dinosaur. Thus, the correct answer is option A.

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