To study pollen germination, some pollen from flowers such as pea, chickpea, Crotolaria, balsam and Vinca are collected and dusted on a glass slide containing a drop of ..a.. Solution about..b..per cent . After about ..c.. Minutes, pollen tubes coming out of the pollen grains.

SUGGESTED ACTIVITIES – CURIOSITIES TO ANSWER Study pollen germination by dusting some pollen from flowers like Pea, Chick pea, Crotalaria, Balsam and Vinca on a glass slide containing a drop of 10% sugar solution. Examine the appearing pollen tubes under low power of microscope.

Which of the following statements is not correct 1. Insects that consume pollen or nectar without bringing about pollination are called pollen/nectar robbers 2. Pollen germination and pollen tube growth are regulated by chemical components of pollen interacting with those of the pistil 3. Some reptiles have also been reported as pollinators in some plant species 4. 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

Select the incorrect statement about in-vitro germination of pollen. (A) It can be easily studied by dusting some pollen from flowers such as balsam on a glass slide. (B) Germination generally requires about 45 - 60 minutes. (C) 10% sucrose solution is required for the germination (D) Both (B) and (C )

If many pollen tubes come out of a pollen grain during its germination, the condition is regarded as

Even after killing the generative cell with a laser beam, the pollen grain of a flowering plant germinates and produces normal pollen tube because

Even after killing the generative cell with a laser beam, the pollen grain of a flowering plant germinates and produces normal pollen tube because

Draw a longitudinal section of the pistil from a flowering plant, where pollination has occurred. Label the following: (a) Stigma showing germinating pollen grains (b) Style (c) Pollen tube reaching the micropyle of the ovule (d) Embryo sac (e) Components of the egg apparatus

Draw a longitudinal section of the pistil from a flowering plant, where pollination has occurred. Label the following: (a) Stigma showing germinating pollen grains (b) Style (c) Pollen tube reaching the micropyle of the ovule (d) Embryo sac (e) Components of the egg apparatus

Distinguish between unisexual and bisexual flowers giving one example of each. Draw a neat diagram showing fertilisation in a flower and label: a] Pollen tube b] Male germ cell c] Female germ cell, on it. OR Draw the diagram showing the germination of pollen on stigma and label the part on which pollination takes place. Answer the following questions based on diagram given aside. i] Name the part marked 'P. in the diagram. ii] How does 'P. reach part 'B'? iii] State the importance of the part 'C'. iv] What happens to the part marked 'D' after fertilisation is over? Mention the role of gamete and zygote in sexually reproducing organisms.