Which of the following statement is wrong as regards to man
All eggs are alike
Eggs are of two types
Sperms are of two types
None of the above
(b)All eggs are haploid and carry $XX$ as genotype.
$I. $ Sperm cells immediately when they are released from the body and are placed in a petri plate remain alive for much longer duration.
$II.$ Semen contains chemicals that causes females smooth muscles to contract
Which part of ovary in mammals acts as an endocrine gland after ovulation
The placental barrier between the maternal and foetal blood is minimum in
Identify the correct option ($A$), ($B$), ($C$), ($D$) with respect to spermatogenesis.
Notochord, skeletal system and dermis of the skin are the derivatives of
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