Geitonogamy and xenogamy are two types of pollination. Differentiate between the two.

Types of pollination in Commelina is

Suppose you are the given four flowers namely maize, vallisneria, sunflower and zostera. (i) State the mode of pollination in each flower. (ii) Differentiate between cleistogamous and chasmogamous flowers.

Assertion, Geitonogamy is functionally cross-pollination involving pollinating agent and genetically it is similar to autogamy since the pollen grains come from the another plant. Reason: Geitonogamy is the only type of pollination which during pollination brings genetically different types of pollen grains to the stigma.