explain sexual reproduction in plant????
Answers
Answer:
Pollen grains are produced inside the anther through the process of meiosis in microspores mother cells (microsporogenesis). Pollen grains are also called the male gametophyte and they contain a tube nucleus and two male gametes.
Inside the ovule, megaspore mother cell undergoes meiosis to make a 7-celled-8-nucleated female gametophyte. It has two synergids, one egg cell, one central cell with two polar nuclei and three antipodals.
During pollination, pollen grain is transferred to the stigma from the anther.
Pollen grain germinates to produce the pollen tube which carries the two male gametes to the female gametophyte via the style.
The two male gametes are released in one of the synergids.
One of the male gametes fuses with the egg cell and forms the zygote. This is called syngamy.
The other male gamete fuses with the polar nuclei of central cell and forms triploid primary endosperm nucleus. This is called triple fusion.
The event of triple fusion and syngamy is called double fertilization.
The zygote develops into an embryo and the primary endosperm nucleus forms the endosperm.
Explanation:
Answer:
Plant reproduction is the production of new offspring in plants, which can be accomplished by sexual or asexual reproduction. Sexual reproduction produces offspring by the fusion of gametes, resulting in offspring genetically different from the parent or parents.