How many male gametes are formed in pollen tube of angiosperms?

How many nuclei are present in mature pollen tube in angiospermic plant just before fertilization?

What is the function of two male gametes produced by each pollen grain in angiosperms?

Choose the correct answer : The fertilization in which male gametes are carried through pollen tube is known as :

Long Answer Questions Five mark Each QUESTIONS FROM CBSE BOARD EXAMINATIONS : A flower of tomato plant following the process of sexual reproduction produces 240 viable seeds. Answer the following questions giving reasons: (a) What is the minimum number of pollen grains that must have been involved in the pollination of its pistil? (b) What would have been the minimum number of ovules present in the ovary? (c) How many megaspore mother cells were involved? (d) What is the minimum number of microspore mother cells involved in the above case? (e) How many male gametes were involved in this case?

Short Answer Questions Describe the development of male gametophyte or pollen in angiosperms with the help of suitable diagrams.

How many cells and nuclei are there in a typical angiosperm embryo sac. Write the function of synergids.

How many angles fare formed in the figures given below?Name them. .

How many Biosphere Reserves are formed in India under MAB programme?

Give reason for the following In angiosperms, one of the male gametes fuses with egg to form zygote and second male gamete fuses with polar nuclei to form primary endosperm nucleus.