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On human foetus, the heart begins to bea...

On human foetus, the heart begins to beat at development age of

A

4th week

B

3rd week

C

6th week

D

8th week

Text Solution

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The correct Answer is:
A
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ALLEN-REPRODUCTIVE SYSTEM , EMBRYOLOGY AND REPRODUCTIVE HEALTH -Exercise-III(A) (Ncert Based Questions)
  1. Foetal sex can be determined by examining cells from the amniotic flui...

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  2. Which of the following is not correct for gastrulation ?

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  3. On human foetus, the heart begins to beat at development age of

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  4. Development of animal embryo from an unfertilized egg is called

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  5. During embryonic development , endoskeleton and muscle develop from wh...

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  6. Polar body is produced durign the formation of

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  7. Fertilization of ovum occurs in

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  8. In a vertebrate which germ layer forms the skeletal muscles ?

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  9. Liver and pancreas of frog and rabbit are derived from :

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  10. Which layer develops first durign embryonic development?

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  11. Acrosome of sperm is formed from

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  12. The nervous system of vertebrates is derived from :

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  13. Cavity formed during gastrulation is

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  14. The occurrence of mitochondria in sperm is

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  15. Identical twins are born when:

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  16. Which set of enzymes is found in the acrosome of mammalian spermatozoa...

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  17. Fixing up of blastocyst in the wall of the uterus is known as

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  18. The type of placenta find in human beings is of type :

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  19. Plaenta in human beings is formed by

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  20. The phenomenon of nuclear fusion of sperm and egg is known as

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