Answer: All the statements are true, and describes Double fertilization in plants
Explanation:
Double fertilization is a process of fertilization of gametes that occurs in only flowering plants. It involves the following:
- A pollen grain produces TWO male gametes
- one male gamete fertilize the egg to form a zygote that is DIPLOID (with two basic sets of chromosomes)
- the second male gamete fuses with another cell named POLAR NUCLEI, to form a diploid nucleus that however, undergoes meiosis leading to partial duplication of the two sets of chromosomes into three sets known as TRIPLOID. The resulting endosperm formed is TRIPLOID, and serves as the food storing tissue in the seed.
- Thus, of the two zygotes formed, one survives growing into a seed, capable of germinating into a young plant; while the other does not survive, but becomes a food storing tissue (endosperm)
Answer: All the above Statements are correct about double fertilization.
Explanation:
Double fertilization is a process found in angiosperms (seed producing plants) in which one sperm fuses with the egg and the other fuses with the two polar nuclei to form diploid embryo and triploid endosperm. Pollen tube produces two sperm. One sperm fertilize the egg to produce diploid zygote and the second fertilize the two polar nuclei to produce triploid endosperm. One zygote survives.
Double fertilization is important because it lead to formation of diploid zygote which develop into new plant, it gives stimulus to plant in that ovary develop into fruits and ovule into seeds.
