Sexual Reproduction In Flowering Plants Ques 18
18. Which of the following statements is not correct?
[2016]
(a) 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.
(b) Insects that consume pollen or nectar without bringing about pollination are called pollen/nectar robbers
(c) Pollen germination and pollen tube growth are regulated by chemical components of pollen interacting with those of the pistil.
(d) Some reptiles have also been reported as pollinators in some plant species.
Show Answer
Answer : a
Hints & Solutions
(a) Pollen grains of different species are incompatible, so they fail to germinate. If the pollen-stigma interaction is compatible, the pollen grain hydrates and germinates shortly following landing on the stigma.
BETA
