EVOLUTION
EVIDENCE FOR EVOLUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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a bat’s wing that enables it to fly
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the tiny leg bones found in snakes that have no legs
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the front legs of a dog that supports its weight as it walks and runs
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the tentacles of an octopus that aid it in movement and catching prey
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Detailed explanation-1: -These structures, which are often reduced in size, are known as vestigial structures. Examples of vestigial structures include the tailbone of humans (a vestigial tail), the hind leg bones of whales, and the underdeveloped legs found in some snakes (see picture at right).
Detailed explanation-2: -Structures that have no apparent function and appear to be residual parts from a past ancestor are called vestigial structures. Examples of vestigial structures include the human appendix, the pelvic bone of a snake, and the wings of flightless birds.
Detailed explanation-3: -Vestigial structures For instance, the tiny vestigial leg bones found in some snakes reflect that snakes had a four-legged ancestor. The small leg-like structures of some snakes species, like the Boa constrictor, are vestigial structures.
Detailed explanation-4: -Natural selection is the process through which organisms with greater environmental adaptations survive and reproduce more. After industrialization, the proportion of dark-winged moths rose, an example of natural selection.
Detailed explanation-5: -Q. What best describes the hind leg bones seen in the whale? The bones are analogous structures to the fins of living fish.