The amniotic fluid is taken out with the help of surgical needle and separation of the embryo cells present in this fluid is done by
Amniotic fluid study
Amniocentesis
Centrifugation
None of these
It's Obvious
Given a diagram showing a portion of a seminiferous tubule. Identify the marked alphbates
Assertion : Senescence is the time when age associated defects are manifested.
Reason : Certain genes may be undergoing sequential switching on and off during one's life.
Label $A, B, C, D$ in following diagram
Which hormone is produced throughout the menstrual cycle?
Cleavage was first observed by
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