Answer:Homologous structures are similar structures that evolved from a common ancestor. Learning Objectives. Describe the connection between evolution and the appearance of homologous structures.
Explanation:A common example of homologous structures is the forelimbs of vertebrates, where the wings of bats and birds, the arms of primates, the front flippers of whales and the forelegs of four-legged vertebrates like dogs and crocodiles are all derived from the same ancestral tetrapod structure.Following are some examples of homology: The arm of a human, the wing of a bird or a bat, the leg of a dog and the flipper of a dolphin or whale are homologous structures. They are different and have a different purpose, but they are similar and share common traits.Homologous structures are structures that are similar in related organisms because they were inherited from a common ancestor. These structures may or may not have the same function in the descendants. Figure below shows the hands of several different mammals. They all have the same basic pattern of bones.Homologous structures share a similar embryonic origin. Analogous organs have a similar function. For example, the bones in a whale's front flipper are homologous to the bones in the human arm.
b. False
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Answer:
E) founder effect and genetic drift
Explanation:
Dunkers moved to Pennsylvania and inhabited a new area to develop a new population. This new population might not have the same gene pool and the same allele frequencies for all the genes as present in the original population. The change in the allele frequencies of a population due to the colonization of a new area by a few members is called the founder effect.
The small size of the new population of Dunkers present in Pennsylvania was more likely to be affected by any chance event which could have added more uniqueness to their gene pool. This is called genetic drift. Therefore, the genetic uniqueness of their population from all the other populations and from their original population might be the result of founder effect and genetic drift.
Answer:
The Visible Light Spectrum and the differences in wavelength and appearance.
Explanation:
I stated this by using the concept of the visible light spectrum. As indicated already in reference to the statements provided, you are observing what is known as the visible light spectrum. This is indicated because the visible light spectrum obtains all the colors of the rainbow and not only that but the statements even use key terms such as wavelengths and different color components. Therefore, signifying that you are looking at the visible light spectrum and observing it on an appearance based observation based on background facts and scientific knowledge. To further evaluate the visible light spectrum in terms of wavelength, both statements A and D provide information regarding the differentiation within wavelengths based on the color in which one perceives. Whereas B and C simply state scientific facts about how the rainbow appears.
A atmo and Cyro should be correct