To answer this question, in scientific research it is necessary to determine the purpose, objectives and methods, and the materials under study. To do this, you need to try to put forward a hypothesis that will make it easier for us to understand what we want, and therefore, will allow us to choose research materials. As a hypothesis, you can rely on your knowledge of the classification of animal groups. However, if you do not have such knowledge and you do not want to suffer in search of this knowledge in fields, forests and laboratories, then you can become an advanced Internet user and use the convenient site lifemap [1], which displays the phylogenetic tree of all animals. If you are not an advanced user, then you can simply use Wikipedia. It should be noted that for a scientist, the Lifemap website is as primitive as Wikipedia,But don't be afraid to start small, because wikipedia can serve as an impetus for the evolution from simple to complex. So let's go evolve on the wiki together. To do this, we will go to the search engine and see information about the groups we need, with which we will work in the future, on this site. The first on the list are bearish. On the site page, we do not need to thoroughly study the structure, reproduction and lifestyle of bears. We need three things:We need three things:We need three things:
Scientific classification section.
Section of phylogenetics.
A summary of the classification, which is displayed in the upper right corner below the scientific classification picture.
Go to the scientific classification section and look at the list of genera in the bear family, having previously written out the name of this family in Latin (Ursidae). We need the names of all the genera in Latin that are in the family. It is also better to write them out (fig. 1).
(fig. 1)
After the work done, we go to the phylogenetics section and select the treasure with the closest living relatives as a backup option.
This should be done in case we cannot find the required genetic sequences of bears from different genera in the genebank (Fig. 2).
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Mount DM. Bioinformatics: Sequence and Genome Analysis. — 2nd. — Cold Spring Harbor Laboratory Press: Cold Spring Harbor, NY., 2004.
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Hasegawa M., Kishino H., and Yano T. ( 1985 ). Dating the human-ape split by a molecular clock of mitochondrial DNA. Journal of Molecular Evolution 22 : 160-174.
https://habr.com/ru/company/mailru/blog/217839/