ANIMAL REPRODUCTION AND DEVELOPMENT
EMBRYONIC DEVELOPMENT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Fully formed animals are sometimes missing limbs or other body parts.
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Embryos can have parts that are not present in the fully formed animals.
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When observing embryos, microscopes can be used to reveal more detail.
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Each embryo is unique; even embryos of animals of the same species can be different.
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Detailed explanation-1: -Comparing the embryos of different animals can show relationships that can’t be seen when comparing the fully formed animals. Why is this the case? Each embryo is unique; even embryos of animals of the same species can be different. When observing embryos, microscopes can be used to reveal more detail.
Detailed explanation-2: -How does comparing the embryos of different organisms support the theory of evolution? The embryos of all organisms are identical. The stages of development of the embryos of different organisms are extremely similar, thereby suggesting common ancestors.
Detailed explanation-3: -Anatomical features shared between organisms (including ones that are visible only during embryonic development) can indicate a shared evolutionary ancestry.
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.