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In human foetus , the heart begins to be...

In human foetus , the heart begins to beat at developmental age of :

A

4th week

B

3rd week

C

6th week

D

8th week

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The correct Answer is:
A
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MOTION-HUMAN REPRODUCTION -EXERCISE - 2 (NCERT BASED QUESTIONS)
  1. Foetal sex can be determined by examining cells from amniotic fluid lo...

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

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  3. In human foetus , the heart begins to beat at developmental age of :

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  4. Development of animal embryo from egg without fertilization is called ...

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

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  6. Polar bodies are produced during the formation of:

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  7. The part where fertilization of ovum occurs in placental mammals is :

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  8. In a vertabrate 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 germ layer developes first during embryonic development?

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  11. Acrosome of spermatozoa 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. In a sperm, the mitochondria occur:

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  15. Identical twins will be produced 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 the blastocyst in the wall of the uterus is known as:

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

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  19. Placenta 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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