MCQ
$HIV$ virus affects …… in $AIDS$ patient
- ACytotoxit $T-$ cell
- B$M-N$ cell
- CSuppressor cells
- ✓Helper $T-$ cells
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Reason : Malaria is caused by polluted water.
$A$. The flowers of Vallisneria are colourful and produce nectar.
$B$. The flowers of water lily are not pollinated by water.
$C$. In most of water-pollinated species, the pollen grains are protected from wetting.
$D$. Pollen grains of some hydrophytes are long and ribbon like.
$E$. In some hydrophytes, the pollen grains are carried passively inside water.
Choose the correct answer from the options given below.