what is meant by double fertilisation in plants???

Answer 1

When pollen fertilise with stigma, resulting in two seeds in the same fruit.

Answer 2

Fertilisation Definition

Answer 3

There are 2 sperm nuclei in the male plant, namely the generative nucleus and the endosperm nucleus.

When those 2 nuclei are fertilised, the generative nucleus fuse with the ova from the female plant to form a fertilised egg which will grow into a plant.

the other endosperm nucleus forms a endosperm instead, which is a source of food for seed or seedlings.

Answer 4

Double fertilisation refers to the process in angiosperms (flowering plants) during reproduction, in which two sperm nuclei from each pollen tube fertilise two cells in an ovary. The pollen grain adheres to the stigma of the carpel (female reproductive structure) and grows a pollen tube that penetrates the ovum through a tiny pore called a micropyle. Two sperm cells (derived from the generative nucleus) are released into the ovary through this tube. One of the two sperm cells fertilises the egg cell (at the end of the ovary), forming a diploid (2n) zygote. The other sperm cell fuses with two haploid polar nuclei (contained in the central cell) in the centre of the embryo sac (or ovule). The resulting cell is triploid (3n). This triploid cell divides through mitosis and forms the endosperm, a nutrient-rich tissue inside the fruit.

The two central cell maternal nuclei (polar nuclei) that contribute to the endosperm arise by mitosis from a single meiotic product. Therefore, maternal contribution to the genetic constitution of the triploid endosperm is different from that of the embryo.

Recently research has shown that in one primitive group of flowering plants, the water lilies, Nuphar, the endosperm is diploid, resulting from the fusion of a pollen nucleus with one, rather than two, maternal nuclei.

In gymnosperms, such as conifers, the food storage tissue is part of the female gametophyte only, a haploid (1n) tissue, so there is no double fertilisation.

Answer 5

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what is meant by double fertilisation in plants???

Answer 6

When the pollen grains fall on stigma,they give rise to pollen tube.
Each pollen tube contains two male gametes out of which one fuses with the egg cell in the embryo sac by a process called syngamy, while,the other gamete fuses with the two polar nuclei by triple fusinon.This process of two fusions taking place in one embryo sac is called double fertilisation in plants

Answer 7

When the pollen grains fall on stigma,they give rise to pollen tube.
Each pollen tube contains two male gametes out of which one fuses with the egg cell in the embryo sac by a process called syngamy, while,the other gamete fuses with the two polar nuclei by triple fusinon.This process of two fusions taking place in one embryo sac is called double fertilisation in plants

Answer 8

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During fertilisation in plants, one male gamete fuses with the egg cell and forms the zygote (this process is called syngamy). The other male gamete fuses with the secondary nucleus (this is called triple fusion). The syngamy and triple fusion together are called double fertilization.

Answer 9

double fertilisation mean 1. developing fruit 2. developing seeds in it.

Answer 10

What Is Double Fertilization