Which one of the following statements is correct?
Cleistogamous flowers are always autogamous.
Xenogamy occursonly bywind pollination.
Chasmogamous flowers do not open at all.
Geitonogamy involves the pollen and stigma of flowers of different plants.
Pollen robbers
$A$ : Geitonogamy helps in maintaining homozygosity and superiority of the race indefinitely.
$R$ : It is functionally, ecologically and genetically cross pollination.
Long silky hairs on cob of maize are
In nature, cleistogamous flowers are
Pollination by insect is