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miafluellen
27.07.2019 •
Biology
How many alleles must be present in order for a trait to show up in the offspring?
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Ответ:
Ответ:
answer: c). invertebrates lived on earth before vertebrates.
the invertebrates are the organisms which lack a particular vertebral column. these animals were living in aquatic habitat undergone a series of adaptations in the course of evolution. they increased the range of habitat from aquatic to land. these invertebrates undergone several adaptations to transform into vertebrate organisms which have proper vertebral column. the development of features from invertebrates to vertebrate transformation can be observed in fossils found in sedimentary layers.