GENETICS AND EVOLUTION
EVOLUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A harmful mutation occurred in the gene for beak length.
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Insects that live deep in tree trunks spread to trees in the woodpeckers’ territory.
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The insect population increased, and birds that ate more insects grew longer beaks.
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The long beak is an adaptation to help woodpeckers fight off predators.
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Detailed explanation-1: -Woodpeckers use their long beaks to dig for and eat insects living in tree trunks. A new species of woodpecker with a very long beak evolves. Which statement best explains how the environment influenced the development of this new species. A harmful mutation occurred in the gene for beak length.
Detailed explanation-2: -Natural selection is the process through which populations of living organisms adapt and change. Individuals in a population are naturally variable, meaning that they are all different in some ways. This variation means that some individuals have traits better suited to the environment than others.
Detailed explanation-3: -Natural selection is the process in nature by which organisms better adapted to their environment tend to survive and reproduce more than those less adapted to their environment. For example, treefrogs are sometimes eaten by snakes and birds.
Detailed explanation-4: -Examples of vestigial structures include the human appendix, the pelvic bone of a snake, and the wings of flightless birds. Vestigial structures can become detrimental, but in most cases these structures are harmless; however, these structures, like any other structure, require extra energy and are at risk for disease.
Detailed explanation-5: -Darwin defined evolution as “descent with modification, ” the idea that species change over time, give rise to new species, and share a common ancestor.