Advertisements
Advertisements
प्रश्न
Even though each pollen grain has 2 male gametes, why at least 20 pollen grains are required to fertilize 20 ovules in a particular carpel?
उत्तर
Even though each pollen grain has two male gametes, only one male gamete is used for fertilizing an ovule, while the other fuses with the polar nuclei to form the endosperm. Therefore, 20 pollen grains are needed to fertilize 20 ovules, as each pollen grain can fertilize only one ovule.
APPEARS IN
संबंधित प्रश्न
Triple Fusion involves:
(i) Fusion of one male, gamete with female gamete
(ii) Fusion of tube nucleus with generative nvcleus
(iii) Fusion of two polar nuclei.
(iv) Fusion of second male gamete with two polar nuclei
Name of the part of the ovary which gives rise to:
Seed ______
Explain the Following Term:
Ornithophily
What is ‘double fertilization’? Describe it with the help of a neat and well-labeled diagram. Give its importance.
Why fertilization process in angiosperms is called as double fertilization?
Write a short note on Pollen kitt.
Give a concise account of the steps involved in the fertilization of an angiosperm plant.
By which of the following double fertilization is exhibited?
In a fertilised embryo sac, the haploid, diploid, and triploid structures are ______.
Identity the part of embryo sac which takes part in formation of primary endosperm nucleus during fertlisation
