Human Reproduction Test-3 Class 12 Notes | EduRev

Class 12 : Human Reproduction Test-3 Class 12 Notes | EduRev

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CBSE TEST PAPER-10 
CLASS - XII BIOLOGY (Human Reproduction) 
1. At what stage is the mammalian embryo implanted in uterus? [1] 
2. Despite the presence of So many sperms in the vicinity of an egg cell, only
one sperm enters the ovum. Why? 
[1] 
3. How many polar bodies are given out in production of one egg during
cogenesis? 
[1] 
4. Why testes of human males are considered extra abdominal? What is the
significance of this condition? 
[2] 
5. Draw a diagram of the T.S. of seminiferous tubule of testis of an adult human
male & label any four parts in it. 
[2] 
6. What is colustrum? What is its significance to new born baby? [2] 
7. A sperm has just fertilized a human egg in the fallopian tube. Trace the
events that the fertilized eggs will undergoes upto implantation of blastocyst 
in the uterus. 
[3] 
8. Where oogenesis does takes place. Describe the stages of this process? [3] 
9. A woman has conceived & implantation has occurred within her uterus.
Discuss the sequence of changes up to parturition which will take place 
within her body under the influence of various hormones. 
[5] 
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