The egg of a chick is laid at which of the following stages?
Correct answer: B. Blastula
- A. Gastrula
- B. Blastula
- C. Cleavage
- D. Morula
Explanation
The egg is laid 24 hours after fertilisation at the stage of blastula, and its further development takes place, when the egg is incubated by the female. Incubation must continue steadily for 21 days at a temperature of 103°F.
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About Growth and Development
Embryonic development covers fertilization, cleavage, formation of the blastula and gastrula, germ layers, organ formation and differentiation. Regeneration describes the replacement of lost tissues or body parts, whereas ageing involves gradual cellular and physiological changes linked to reduced repair, altered metabolism and declining organ function.
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