MCQ
Normal secondary growth occurs in
- ✓Dicot stem
- BMonocot stem
- CBoth $(a)$ and $(b)$
- DRoot
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$(i)$ Unicellular, colonial, filamentous, symbiotic or free living.
$(ii)$ The colonies are surrounded by a gelatinous sheath.
$(iii)$ Some can fix atmospheric nitrogen in specialized cells called heterocysts.
$(iv)$ They often form blooms in water bodies.
$I.$ the chromosome number is reduced to haploid state
$II.$ the amount of $DNA$ is reduced to haploid state
The correct option is