Following are some of the events that occur during the development of animals.The structures formed during the event X are
Correct answer: B. Blastomeres
- A. Somites
- B. Blastomeres
- C. Epiblast and hypoblast
- D. Neural groove and neurocoel
Explanation
The correct answer is Option B: blastomeres. Blastomeres are the cells that result from the cleavage of the zygote, which is one of the earliest stages of embryonic development. During cleavage, the single-celled zygote divides into multiple smaller cells known as blastomeres.Option A: somites are structures related to later development stages involved in forming vertebra and muscle organization, not the initial cell divisions. Option C: epiblast and hypoblast are layers formed during gastrulation, which occurs after cleavage. Option D: neural groove and neurocoel are structures formed during neurulation, another later stage of development.
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About Embryonic Development
Embryonic development begins after fertilization with cleavage and formation of the morula and blastula, followed by gastrulation and the establishment of germ layers. It includes organ formation, tissue differentiation and early growth, rather than the later increase in size associated with postnatal development.
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