Question

Each pollen grain produces two male gametes. How many pollen grains will be required to fertilize 4 ovules present in a particular carpel? Give reasons

Answer 1

4 pollen grains for 4 ovules as [ one male gamete fuses with egg and forms zygote whereas second male gamete fuses with the secondary nucleus and forms PEN (primary endospore nucleus) which later on forms endosperm ]