MCQ
Bartholin's glands are situated?
- AOn the sides of the head of some amphibians.
- BAt the reduced tail end of birds.
- ✓On either side of vagina in humans.
- DOn either side of vas deferens in humans.
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$R -$ A typical angiosperm embryo sac, at maturity,though $8$-nucleate is $7$-celled
$(i)$ Due to alteration of $DNA$ sequences genotype is change.
$(ii)$ Changes occur in phenotype.
$(iii)$ Variation create in $DNA$
$R$ : These are sacred grooves where biota is protected on-site