MCQ
Double fertilization and triple fusion were discovered by.
- AHofmeister.
- ✓Nawaschin and Guignard.
- CLeeuwenhoek.
- DStrasburger.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
$A$. 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.
Reason : Allergens in the environment on reaching human body stimulate mast cells in certain individuals.