Question

Describe the three types of pollination that can occur in a chasmogamous bisexual flower.

(a) Distinguish between the two cells enclosed in a mature male gametophyte of an angiosperm. (b) Study the diagram given below showing the modes of pollination. Answer the questions that follow. (i) The given diagram shows three methods of pollen transfer in plants. Examine them carefully and write the technical terms used for pollen transfer methods '1', '2' and '3'. (ii) How do the following plants achieve pollination successfully ? (a) Water lily (b) Vallisneria (iii) Write advantages of pollen transfer method '3'.

Meena had grown Rose and China-rose plants in her garden. She collected pollen grains from China-rose plants and sprinkled them on stigma of the Rose flowers, as she wanted to grow a hybrid variety of Rose.

Student to attempt either option-(A) or (B) :