REPRODUCTION
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: -When comparing the embryos of different organisms, the theory of evolution is supported because the embryos of any group of living things resemble the other embryos in that group. The study of embryos is called Embryology.
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: -chimera, in genetics, an organism or tissue that contains at least two different sets of DNA, most often originating from the fusion of as many different zygotes (fertilized eggs).
Detailed explanation-5: -The biogenetic law is a theory of development and evolution proposed by Ernst Haeckel in Germany in the 1860s. It is one of several recapitulation theories, which posit that the stages of development for an animal embryo are the same as other animals’ adult stages or forms.