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To classify organisms, scientists use similarities and variations among species. typically these variations area unit simple to ascertain, like whether or not associate animal has fur, feathers, or scales. There area unit seven main assortment ranks: kingdom, phylum or division, class, order, family, genus, species.
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A bond formed by the electrical attraction between two oppositely charged ions is an Ionic bond ....
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Answer:
Although more offsprings are produced by the process of external fertilization but the process of internal fertilization is more efficient as compared to external fertilization. This is because, in external fertilization, it is more difficult for the sperm to find the egg and fertilize it. Even after fertilization, it might be that the zygote gets eaten up by a predator. There are none such risks in internal fertilization. The zygote is protected during the internal fertilization which makes this process more efficient.
