Homework- Biology 2010 Tree thinking exercise Recent analyses of genes called re
ID: 140811 • Letter: H
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Homework- Biology 2010 Tree thinking exercise Recent analyses of genes called retroposons support the hypothesis that there is a monophyletic group of mammals that originated and diversified in Africa. The data that support this conclusion, and the resulting tree, are shown here. The numbers across the top of the table identifly difflerent retroposons; the 1s and 0s for each species indicate that a particular retroposon is present (1) or absent (0). For each question, choose the single best answer. There are a total of 13 questions. Manatee Hyrax Tearec Elephant shrews Question 1 Sister groups (or species) are each others' closest relative-meaning that they share a most-recent common ancestor. For example, manatees and hyrax are sister groups on this tree, and elephant shrews are a sister group to aardvark + tenrec Based on the data given, when elephants are added to the tree they should be a sister group to: Manatee Hyrax Manatee +hyrax Aardvark Tenrec Aardvark + tenrec Elephant shrew Aardvark+tenrec+ elephant shrew Everyone (manatee + hyrax + aardvark + tenrec + elephant shrew)Explanation / Answer
Hello student, I can only reply 4 que/parts at a time so I am answering ist 4 questions.
Ans1) sister groups are Manatee and Hyrax; Aardvark andTenrec ; (Manatee +Hyrax) and Elephant ; (Aardvark + Tenrec) and Elephant shrew. So option 3 is right.
Ans2)1-6 retroposons support the hypothesis that all species in table are part of a monophyletic.
Ans3) evolution of insect eating bird show that from their birds that eat insect evolve and before these or other then these are not insect eating birds so ans is Aardvark+ Tenrec + Elephant shrew.
Ans4)homoplasy is convergence where different organism evolve according to similar environment ,here also whale and sea cow evolve acc.to similar environment water .so,answer is homoplasy- whales are not that closely related to manatess,so it is logical to infer that the similarities evolved independently in two groups.
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