Note: Filiform apparatus are the finger like projection which guides the entry of pollen tubepollen tube The angiosperm pollen tube is simple, unbranched, and fast growing, however this is not the case for ancestral plants. ... The pollen tube is highly branched and grows on the female sporophyte tissues. First, it grows the main tube followed by a more spherical tip at the end to allow the sperm to burst near the archegonia. › wiki › Pollen_tube

Pollen tube - Wikipedia

and helps in the release of sperms. It also helps in absorption and conduction of food materials from nucellus to the embryo sac.

What is the function of filiform apparatus in Class 12?

A special cellular thickening present in the synergids at the micropylar end is called filiform apparatus. After fertilization when the egg cell gives rise to zygote, they get disorganized. The major function is to guide the entry of pollen tubes into synergids and to release sperm cells.

What is the main function of filiform apparatus present at the micropylar?

Answer (e) It guides the entry of pollen tube into a synergid and discharge the male gametes.

What is the function of Tapetum and filiform apparatus?

Tapetum: It develops during microsporogensis in the anther (microsporangium.) Its function is to provide nourishment to the developing pollen grains. Synergids: They develop during megasporogenesis in the ovule (megasporangium.) Synergids have the filiform apparatus which help to guide the pollen tube into it.

What is the function of filiform apparatus in an Angiospermic embryo sac?

Option B: Filiform apparatus is an apparatus that is formed inside the embryo sac of the angiosperms by the synergid cells. This apparatus helps the pollen tube towards the egg for fertilization to happen. Thus it helps in the reproduction process of the angiospermic plants.

Function of filiform apparatus is to :-

31 related questions found

What is the function of filiform apparatus in Synergids?

Function of filiform apparatus:

- It helps in the entry of pollen tubes in synergids.

What do you mean by filiform apparatus?

: a prolongation of the synergids beyond the summit of the embryo sac.

Where is filiform apparatus present?

The filiform apparatus is the thickened and prominent structure present in the synergids cells of the embryo sac. They are the finger-like projections that are located near the micropylar end of the embryo sac.

Where do you find the filiform apparatus?

The filiform apparatus is located at the tip of the megasporangium or the embryo sac. At the tip of the micropylar end, We can find a thickened structure called filiform apparatus. The filiform apparatus plays a significant role in leading the pollen tubes towards the embryo.

What is the function of the filiform apparatus guide the entry of pollen tube recognize the suitable pollen at the stigma produce nectar stimulate division of generative cell?

- Filiform apparatus plays a role in directing pollen tube growth to the synergid cell. One of the synergids forms a seat for pollen tube discharge in the embryo sac. - Filiform apparatus may be aiding the synergid in absorption and transportation of materials into embryo sac from the nucleus.

Which of the following has filiform apparatus?

Complete Answer:

1) The synergid cell wall forms a highly thickened structure called the filiform apparatus at the micropylar end.It consists of numerous finger-like projections which are into the synergid cytoplasm.

What is the function of tube nucleus in fertilization?

The tube nucleus controls the growth of the pollen tube as grows down the style and into the ovary of a flower. Eventually it penetrates the micropyle of an ovule and releases its two sperm into the 8-nucleate embryo sac. During double fertilization, one sperm fuses with the egg nucleus to form a zygote.

Why is filiform apparatus important?

The filiform apparatus plays an important role, it guides the entry of pollen inside the synergid present at the micropylar end of the embryo sac. The pollen tube is shown chemotaxis, filiform apparatus secretes chemicals that guide the pollen tube towards the embryo sac.

How is filiform apparatus formed?

Hint: Filiform apparatus is formed from synergid cells. ... Complete answer: At the micropylar end of the embryo sac, the synergid cell wall forms a strongly thickened structure called the filiform apparatus. It consists of several finger-like projections into the synergid cytoplasm.

Where exactly is the filiform apparatus present in the embryo sac of the angiosperms?

In the embryo-sac of an angiosperm, the filiform apparatus is present in the synergids. The synergids have special cellular thickenings at the micropylar tip which are filiform apparatus. The filiform apparatus helps in guiding the entry of the pollen tube into the synergid.

Is filiform apparatus present in gymnosperms?

Filiform apparatus is present in A. Male gametophyte of angiosperms. ... Male gametophyte of gymnosperms.

Which of the following play an important role in guiding the pollen tube into the Synergid?

The filiform apparatus is believed to play a major role in pollen tube guidance and reception. It has also been assumed that the pollen tube enters the receptive synergid cell through the filiform apparatus.

What does an ovule contain?

Ovules are immature seeds, consisting of a stalk, the funiculus, a megasporangium (also called the nucellus), from which develops the megasporocyte and female gametophyte, plus one or two surrounding integuments.

What do you mean by Monosporic development of embryo sac?

The female gametophyte in an angiosperm is also called the embryo sac. ... The megaspore mother cell divides by meiotic division to give rise to 4 haploid megaspores. Generally, only one megaspore is functional and develops into the female gametophyte or the embryo sac. This is known as monosporic development.

What is ploidy filiform apparatus?

Since all the structure are formed from megaspore, so synergid is haploid and it gives rise to filliform apparatus. So, Filliform apparatus is also haploid.

What is the function of germ pore?

Germ pore plays an essential part in the fertilization of plants. It helps in pollen tube formation and releases the male gamete during fertilization.

What does the filiform apparatus do at the entrance of the Oval?

Explanation: Filiform apparatus helps in the entry of pollen tube into a synergid in ovule. Filiform apparatus is in form of finger like projection comprising a core of micro fibrils enclosed in a sheath. ... The filiform apparatus responsible for the absorption of food from the nucleus.

What is triple fusion?

: the fusion involving two polar nuclei and a sperm nucleus that occurs in double fertilization in a seed plant and results in the formation of the endosperm.

What is the significance of pollen pistil interaction?

Pollen-pistil interaction is unique in flowering plants and plays a significant role in sexual reproduction and seed formation. The pollen grains carrying the male gametes do not have a direct admittance to the female gamete.

What does filiform apparatus do at the entrance into embryo sac?

Within the embryo sac three cells are grouped together at the micropylar end and constitute the egg apparatus. ... The synergids have special cellular thickenings at the micropylar tip called filiform apparatus, which plays an important role in guiding the pollen tubes into the synergid.