ANIMAL REPRODUCTION AND DEVELOPMENT
EMBRYONIC DEVELOPMENT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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These organisms are related by a shared common ancestor.
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These organisms will take the same amount of time to develop.
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These organisms will have the same role in the same habitat.
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The organisms will share these same features as adults.
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Detailed explanation-1: -The embryos of two different organisms are observed to have similar features. What is the most reasonable conclusion that can be drawn from this observation? These organisms are related by a shared common ancestor.
Detailed explanation-2: -What is the most reasonable conclusion that can be drawn from a comparison of these structures? Humans and bats share a closer evolutionary history with each other than with birds. Comparing the embryos of different animals can show relationships that can’t be seen when comparing the fully formed animals.
Detailed explanation-3: -Comparative embryology is the study of the similarities and differences in the embryos of different species. Similarities in embryos are likely to be evidence of common ancestry. All vertebrate embryos, for example, have gill slits and tails.
Detailed explanation-4: -In biological research, when embryonic cells from two different organisms are mixed at the blastocyst stage and allowed to generate adult animals, the resulting hybrids, composed of cells from both donors, are called chimeras.
Detailed explanation-5: -Similar anatomy across different species highlights their common origin and can be seen in homologous and vestigial structures. Embryology provides evidence for evolution since the embryonic forms of divergent groups are extremely similar.