Question

what helps the embryo into the hens egg grow into a chick​

Answer 1

The development of the chick begins in the single cell formed by the union of two parental cells, egg and sperm, in the process known as fertilization. In birds, fertilization occurs about 24 hours before the egg is laid.

The newly formed single cell begins to divide into 2, then 4, 8, 16, 32 and so on. At the time of laying, hundreds of cells are grouped in a small, whitish spot (the blastoderm or germinal disc) that is easily seen on the surface of the yolk.

When the egg is laid and cools, division of the cells ceases. After the egg is laid, cooling the egg after the egg is laid does not result in the death of the embryo. It may resume its development after several days of rest if it is again heated by the hen or in an incubator.

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Answer 2

$\huge\mathbf\red {Answer:-}$
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The development of the chick begins in the single cell formed by the union of two parental cells, egg and sperm, in the process known as fertilization. ... When the egg is laid and cools, division of the cells ceases. After the egg is laid, cooling the egg after the egg is laid does not result in the death of the embryo.
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