MCQ
Placentation found in sunflower
- AFree central
- BAxile
- CMarginal
- ✓Basal
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$X - Y - Z$
$I$.Photo inbibition $II$. Photo-oxidation $III$. Photo-reduction
Select the/correct option which matches with statement
$I$. Each cell of sporogenous tissue in anther is capable of giving rise to microspore tetrad.
$II$. The pollen grain represent male gametophyte.
$III$. Pollen grains are usually triangular and $10-15 \mu m$ in diameter.
$IV$. Sporopollenin is one of the most resistance organic material which can be destroyed only by strong acids
and alkali.