MCQ
The germpores on the pollen grains are found on the
- ✓Exine only
- BIntine only
- CBoth exine and intine
- DVegetative cell
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$I$. Insulin for curing diabetes, used to be extracted from the pancreas of slaughtered pig and cattle
$II$. Animal insulin is slighty different from the human insulin
$III$. Animal insulin causes some undesirable side effects such as allergy
$IV$. Bacteria cannot be made to synthesise insulin from its gene because of the presence of introns
Choose the correct option
Reason : Sex in humans is a polygenic trait depending upon a cumulative effect of some genes on $X-$ chromosome and some on $Y-$ chromosome.
Here $A$ and $B$ refers to