Question

Which of the following statements is not correct ?

(a) Insects that consume pollen or nectar without bringing about pollination are called pollen nectar robbers

(b) Pollen germination and pollen tube growth are regulated by chemical components of pollen interacting with those of the pistil

(c) Some reptiles have also been reported as pollinators in some plant species

(d) Pollen grains of many species can germinate on the stigma of a flower, but only one pollen tube of the same species grows into the style

Answer 1

Correct option (d) Pollen grains of many species can germinate on the stigma of a flower, but only one pollen tube of the same species grows into the style

Explanation

Pollen grains of different species are incompatible, so they fail to germinate. Only the pollen of the same species germinate and can form pollen tube which grows and finally dispatches male gamete to embryo sac.