Base your answer on the phylogeny below. Considering the three circled HIV strains (orange, green, and blue), which statement is TRUE?
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This is an evolutionary tree based on RNA sequences of various strains of HIV (human immunodeficiency virus) and SIV (simian immunodeficiency virus; simians are monkeys and apes). The stars indicate HIV strains (those that infect humans). There are two main strains of HIV (1 and 2). HIV-1 is the most common and widespread strain. This tree shows how various strains of HIV evolved from SIV. The brackets indicate which species the SIV strains infect (two subspecies of chimpanzee and the sooty mangabey, a type of monkey). The unlabeled strains infect other species of monkeys. As viruses evolve, they can jump from one host species to another. Based on this tree, which of the following statements is true?
Madhur L.
28. This diagram represents the phylogeny (evolutionary history) of the HIV virus and its non-human primate relatives. Correctly match each label with its description (8 pts). In the questions below, be sure to note the distinction between HIV and HIV-1 and SIV. Label Your answer This node represents the common ancestor of one group of human HIV-1 viruses and their closest chimpanzee SIV relatives. This node represents the common ancestor of a group of SIV viruses that have not been transmitted to humans. This node represents the common ancestor of all human HIV viruses and all of their non-human primate relatives. This node represents the common ancestor of all human HIV-1 lineages and their chimpanzee SIV relatives.
Supreeta N.
The evolutionary tree of HIV-1 revels that a. the virus jumped from chimpanzees to humans four times. b. HIV is a monophyletic clade that originated from the same strain of SIV. c. the SIV strain that infects gorillas is the same strain that infects chimpanzees. d. western chimpanzees are more closely related to gorillas than eastern chimpanzees.
Sirisa R.
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