EVOLUTION
EVIDENCE FOR EVOLUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It shows that they have a common ancestor because of their similarities earlier on in development.
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It shows that they lived in the same environment.
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It does not give evidence for the evolution of species.
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Detailed explanation-1: -Comparative Embryology Similarities in embryos are likely to be evidence of common ancestry. All vertebrate embryos, for example, have gill slits and tails. All of the embryos in Figure 9.3. 4, except for fish, lose their gill slits by adulthood, and some of them also lose their tail.
Detailed explanation-2: -Embryological Evolution Most embryos look similar in their early stages, but as they develop, the differences between species become more obvious. Embryos of organisms that have a closer genetic relationship to one another tend to look similar for a longer period of time since they share a more recent common ancestor.
Detailed explanation-3: -How does embryology support evolution? (a) The early stages of embryonic development may mirror early developmental stages of ancestral forms. (b) Early embryonic stages are very dissimilar in species with a common ancestor, making it easier to classify organisms and determine their evolutionary lineage.