Quick Answer: What Is Triple Fusion Ncert?

How many gametes are involved in triple fusion?

3 gametesAnswer.

3 gametes participate in double fertilisation and triple fusion.

One male gametes fuses with the egg cell(female gamete), while the other fuses with the polar nuclei..

Why does triple fusion take place in flowering plants?

Answer:triple fusion takes place in the embryo sac. The vegetative cell of the matured male gamete fuses with the polar nuclei and hence it is refered as triple fusion. This results in formation of PEN i.e primary endosperm nucleus whose ploidy is 3n.

What is the function of endosperm?

The endosperm plays an important role in supporting embryonic growth by supplying nutrients, protecting the embryo and controlling embryo growth by acting as a mechanical barrier during seed development and germination.

What is the final product of Syngamy?

Syngamy (frequently labeled by “Y!”), is the fusion of two cells, resulting in a cell that has twice as many chromosomes. The two cells which are fused together are called gametes, and the resulting cell is a zygote.

Who discovered triple fusion?

Double fertilization and triple fusion were discovered by Nawaschin and Guignard in Fritillaria and Lilium. In angiosperms one male gamete fuses with the two polar nuclei to form triploid primary endosperm nucleus. The process is called triple fusion. These two acts together are known as double fertilization.

What are Synergids?

Synergid cells are two specialized cells that lie adjacent to the egg cell in the female gametophyte of angiosperms and play an essential role in pollen tube guidance and function. … The synergids are also essential for the cessation of pollen tube growth and release of the sperm cells.

What is double fertilization 10th?

Double fertilization : It occurs when one male nucleus fertilizes (fuses) with egg cell to form zygote cell and other male nucleus fuses (fertilizes) with two polar nuclei to cause triple fusion. … After fertilization: (i) Ovary develops into fruit. (ii) Ovules develop into seeds.

What is the significance of triple fusion?

Triple fusion is the fusion of the male gamete with two polar nuclei inside the embryo sac of the angiosperm. This process involves the fusion of three haploid nuclei, hence it is known as triple fusion. It results in the formation of the endosperm.

What is Syngamy and triple fusion?

Triple fusion Definition. The fusion of male and female gametes during the fertilization is known as syngamy. The fusion of the sperm cell with the two polar nuclei during the double fertilization is known as triple fusion.

Whats a endosperm?

Endosperm, tissue that surrounds and nourishes the embryo in the seeds of angiosperms (flowering plants). In some seeds the endosperm is completely absorbed at maturity (e.g., pea and bean), and the fleshy food-storing cotyledons nourish the embryo as it germinates.

Which of the following is a result of triple fusion?

Since the process involves the combining or fusing of three haploid nuclei, it is referred to as triple fusion. The end result, outcome of the process of triple fusion is the formation of the endosperm.

Who discovered Syngamy?

StrasburgerStrasburger – Discovered syngamy in Monotropa.

What is a triple fusion?

What is Triple Fusion. Triple fusion is the fertilization of the two polar nuclei in the embryo sac. It occurs during the double fertilization of angiosperms. While one sperm cell fertilizes the egg cell in the embryo sac, the other sperm cell fertilizes the two polar nuclei found in the central cell.

How does triple fusion occur?

Triple fusion is the fusion of the male gamete with two polar nuclei inside the embryo sac of the angiosperm. This process of fusion takes place inside the embryo sac. When pollen grains fall on the stigma, they germinate and give rise to the pollen tube that passes through the style and enters into the ovule.

What is double fertilization and triple fusion class 10?

One male gamete fuses with the female gamete and the other fuses with the secondary nucleus. As two male gametes take part and fertilization and fertilization takes place twice, this process is called double fertilization. Since three gametes are involved it is called triple fusion.

What is meant by Syngamy?

: sexual reproduction by union of gametes : fertilization.

What is Embryosac?

noun Botany. the megaspore of a seed-bearing plant, situated within the ovule, giving rise to the endosperm and forming the egg cell or nucleus from which the embryo plant develops after fertilization.

How many gametes and nuclei participate in triple fusion?

Since this process involves the fusion of three haploid nuclei, it is known as triple fusion. It results in the formation of the endosperm. One male gamete nucleus and two polar nuclei are involved in this process.

What is Syngamy class 10th?

When a pollen grain fuse with egg then zygote forms. This is known as fertilization. Since, the fertilization occurs in plants. So, such type of fertilization in plants is known as Syngamy. It is in Reproduction chapter of class 10th chapter number 8.