1. Explain three important embryonic components that result from gastrulation, including why they are important in bilaterian...

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Biology

1. Explain three important embryonic componentsthat result from gastrulation, including why they are important inbilaterian animals.
2. Describe the basic difference between protostomesand deuterostomes. In which group would humans belong? Inwhich group would you expect to see identical twins, and why?
3.Explain why the notochord is especially important during theembryonic development of chordates.
4.Molecular evidence suggests that hagfish andlamprey should form sister taxa. Explain why manyphylogenies suggest that lamprey branched off after hagfish, andwould thus be more closely related to jawed vertebrates.
5.Explain why it may have been important for hagfish to havelost their backbone.
6.Explain why the life cycle of lamprey is said to beanadromous. In which part of their life cycle are theyparasites?

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3.8 Ratings (451 Votes)

1 When the single layered blastula proliferates in an organised way and form a multilayered gastrula this process is known as gastrulation This gastrulation process gives rise to three important embryonic components which are collectively known as germ layers The germ layers are nothing but layers of cells The external germ layer is known as ectoderm the internal layer is known as endoderm and the germ layer present between the ectoderm and endoderm is known as mesoderm These three germ layers makes the bilateral organisms triploblastic Also the mesoderm and endoderm gives a body cavity to the organism known as coelom But the main function of See Answer

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