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What happens during fertilization when many sperms reach close to ovum ....

A. Cells of corona radiata trap all the sperm except one

B. Only two sperms nearest to ovum penetrate zona pellucida

C. Secretion of acrosome helps one sperm enter cytoplasm of ovum through zona pellucida

D. All sperms except the one nearest to ovum lose their tails

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  1. In human embryo, the digestive system develops from the
  2. Third phase of embryo development is ...
  3. The middle piece of the sperm contains
  4. In uterus, endometrium proliferates in response to ...
  5. Cell division that occurs in zygote is called
  6. Mongolian idiocy due to trisomy in 21st chromosome is known as
  7. Decreased motility of sperm <40 % is known as
  8. The three primary germ layers, ectoderm, endoderm and mesoderm are differentiated during
  9. HCG, HPL and relaxin are produced in women ...
  10. Tunica albuginea is related to
  11. Immediately after ovulation, the ovum is covered by a membrane called
  12. Fertility in women may be impaired by
  13. The embryonic stage that resembles a mulberry fruit is
  14. Identical twins are also known as ..
  15. The rate of active movement of sperm is ...
  16. Secretion of testosterone is stimulated by
  17. Level of estrogen and progesterone are minimum at the time of
  18. Human female reaches menopause at the age of about ...
  19. Approximately how long does it take for a spermatocyte to complete its differentiation into a spermatozoan…
  20. Layers of ovum from outside to inside are .
  21. Ovulation occurs under the influence of high titre of
  22. Normal sperm count is
  23. Emergency contraceptives may prevent pregnancy if used within 72 hrs of
  24. An abnormal human male phenotype involving an extra x-chromosome (xxy) is found in....
  25. The functional unit of testis of man is ...
  26. Corpus luteum secretes
  27. Which one is not the function of human placenta
  28. Haemophilia is more common in males because it is a
  29. Human embryo is enclosed by a sac called
  30. Correct sequence in embryonic development is ..