Even in absence of pollinating agents seed setting is assured in
Commelina
Zostera
Salvia
fig
Identify the set of correct statements:
$A$. 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.
What are chasmogamous flowers? Can cross-pollination occur in cleistogamous flowers? Give reasons for your answer.
What type of pollination takes place in Vallisneria?
Given below are two statements :
Statement $I:$Cleistogamous flowers are invariably autogamous
Statement $II:$Cleistogamy is disadvantageous as there is no chance for cross pollination.
In the light of the above statements, choose the correct answer from the options given below :
Aquatic plant like water-hyacinth and water lily are pollinated by