Identify the correct sequence of events involved in sexual reproduction in angiosperms.
A. Pollination
B. Development of microspores in pollen sac
C. Double fertilisation
D. Development of male gametophyte
Choose the correct answer from the options given below
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → B, D, A, C
(B) Development of microspores in pollen sac — this comes first. Microspore mother cells in the pollen sac divide by meiosis and form microspores.
(D) Development of male gametophyte — this comes second. Each microspore becomes a pollen grain, the male gametophyte, with a vegetative cell and a generative cell. This happens inside the anther, before the pollen is shed.
(A) Pollination — this comes third. Pollen grains are carried to the stigma. This is possible only once the pollen has been formed.
(C) Double fertilisation — this comes last. After pollination the pollen tube grows and delivers two male gametes into the embryo sac, one fuses with the egg and the other with the polar nuclei.