Who first observed the process of fertilization in sea urchins?

  • A
    $O$. Hertwig
  • B
    Flemming
  • C
    Waldeyer
  • D
    Wilson

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In sexually reproducing animals,the union of male and female gametes forms a cell which is called:

The function of $Gynogamone-I$ is:

Which structure becomes embedded in the endometrium of the uterus?

Meridional cleavage results in blastomeres numbering

Morula formed at the end of cleavage is . . . . . . celled.

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