Trace the sequence of events that lead to development of a chick from the fertilised egg of a hen.
NCERT Class VIII
Science - Exemplar Problems
Chpater 9. Reproduction in Animals
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In hens the fertilisation is internal as it takes place inside the body of femal .But unlike humans,the development of the young ones take place outside the body of the female bird.
FORMATION OF EGG SHELL__
After fertilisation ,the zygote starts dividing and moves down the oviduct. As it moves down a no. of protective layers are formed around it. The egg shell is one of those protective layers . It is deposited around the egg shell in the lower part of oviduct of the hen, just before the egg is laid. the egg shell is made up of Calcite, a crystalline form of calcium carbonate.
INCUBATION__
The embryo develops inside the egg for around 21 days Which is known as the incubation period after which the chick gets fully developed. During incubation period, the eggs require specific temperature .
This is given by the hen by sitting on it or through artificial incubators
HATCHING___
Finally;the egg shell breaks down and the chick comes out. This process is called Hatching .
✔❤Hope This Helps U FRIEND!!❤✔
#DIYA✌
HERE U GO____➡️
In hens the fertilisation is internal as it takes place inside the body of femal .But unlike humans,the development of the young ones take place outside the body of the female bird.
FORMATION OF EGG SHELL__
After fertilisation ,the zygote starts dividing and moves down the oviduct. As it moves down a no. of protective layers are formed around it. The egg shell is one of those protective layers . It is deposited around the egg shell in the lower part of oviduct of the hen, just before the egg is laid. the egg shell is made up of Calcite, a crystalline form of calcium carbonate.
INCUBATION__
The embryo develops inside the egg for around 21 days Which is known as the incubation period after which the chick gets fully developed. During incubation period, the eggs require specific temperature .
This is given by the hen by sitting on it or through artificial incubators
HATCHING___
Finally;the egg shell breaks down and the chick comes out. This process is called Hatching .
✔❤Hope This Helps U FRIEND!!❤✔
#DIYA✌
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Explanation:
In software engineering, tracing involves a specialized use of logging to record information about a program's execution. This information is typically used by programmers for debugging purposes, and additionally, depending on the type and detail of information contained in a trace log, by experienced system administrators or technical-support personnel and by software monitoring tools to diagnose common problems with software.[1] Tracing is a cross-cutting concern.
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