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When does the process of reduction division take place in pteridophytes?
The process of reduction division happens concurrently with the formation of spores in pteridophytes. Explanation: It is during the process of sporogenesis that the reduction division takes place. The formation of the haploid spores, which is the first stage of the gametophyte process, takes place during this phase of the process.
What is meant by the term “reductive division”?
Meiosis is the process through which germ cells are created. The first cell division that occurs during this process is called the reduction division. During the process of reduction division, the number of chromosomes is decreased from haploid (22 chromosomes) to diploid (46 chromosomes). First meiosis is another name for the first division that occurs during meiosis.
Where in the moss plant does the process of reduction and division take place?
Moss: During sexual reproduction, reduction division takes place in the capsule of mosses, which are classified as bryophytes. During the process of sexual reproduction, reduction division takes place in the sporangia of the fern, which results in the generation of many spores.
When and where in the life cycle of a liverwort, moss, fern, gymnosperm, and angiosperm does the process of reduction division take place?
Answer: During the process of producing spores from spore mother cells, the life cycle of a liverwort, moss, fern, and gymnosperm undergoes reduction divisions, which is also known as a reduction division. In the case of an angiosperm, the reduction division takes place during the construction of an embryo sac from the ovule, as well as during the formation of pollen grains from the anthers.
Pteridophyta undergo reduction division whenever the following conditions are met:
28 questions found in related categories
What exactly is the process of meiotic cell division?
Meiosis is a type of cell division that results in the production of four gamete cells and a reduction of the total number of chromosomes in the parent cell by one half. This process is essential for the development of egg cells and sperm cells, which are necessary for sexual reproduction… Meiosis starts with a parent cell that is diploid, which means it contains two copies of each chromosome. Here is where the process begins.
Is the Gemmae species haploid?
Gemmae are tiny discs composed of haploid tissue, and they are directly responsible for the production of new gametophytes. Rainfall is what causes them to fall from the gemma cups and get distributed. The gemmae are perfectly symmetrical on both sides, and their dorsal and ventral surfaces are not distinguished in any way.
Where exactly does the process of reduction and division take place?
Following the completion of the reduction division in the stamen, which results in the production of haploid pollen grains, and in the ovary of the pistil, which results in the production of eggs, the two reproductive structures subsequently fuse together to form the sporophytic plant body. Meiosis results in the production of 4 haploid cells.
Is the Protonema made up of two chromosomes?
A. Haploid, which occurs naturally in mosses. In its gametophyte form, the plant goes through a number of developmental phases, including the spore, the protonema, and the gametophore, which is responsible for the production of the sexual organs.
Have protonemata been found in all bryophytes?
When moss spores germinate, they give rise to a filamentous structure that resembles algae and is called the protonema… They eventually develop into gametophores, stalks, and structures that resemble leaves. The bryophytes lack real leaves, often known as megaphylls. Protonemata are present in all types of mosses as well as some types of liverworts, however they are not found in hornworts.
Which type of division is referred to as the equational type?
The process of cell division known as mitosis involves the duplication and distribution of chromosomes in an equal manner to produce two daughter cells that are genetically identical to the parent cell. The term “diploid” refers to a situation in which the number of chromosomes in each daughter cell is identical to the number found in the parent cell. Because of this, the mitotic process is often referred to as the equational division.
Why is the process of meiosis referred to as equational division?
During meiosis, the number of diploid chromosomes is decreased to the number of haploid chromosomes… Because the number of chromosomes and amount of DNA in the daughter cells stay the same as in the parent cells, this method of cell division is referred to as equational division.
Which of these processes is known as recurrent cell division?
Thus, the response that is right is ‘Mitosis.’
What part of the plant is considered to be its primary body?
Because it is a diploid multicellular stage that differentiates into real root, stem, and leaves, the sporophyte is the major plant body of pteridophyte. This is because the sporophyte is the stage at which the plant first produces true roots.
What does it mean that pteridophytes are classified as vascular cryptogams?
Pteridophytes are classified as vascular cryptogams due to the fact that they do not produce seeds or blooms but do have xylem and phloem in their tissues.
Which of these is the first plant with vascular tissue?
Pteridophyta was the first group of plants to have vascular systems. In addition to these names, pteridophytes are sometimes referred to as the earliest vascular cryptogam or as spore-bearing vascular plants. These are the first land plants ever discovered to have vascular tissues.
What exactly is an example of Protonema?
(i) The Protonema stage is characterized by its ability to creep, its green color, its branched structure, and its usually filamentous nature. In the life cycle of mosses, the gametophytic stage is a haploid stage that occurs independently. It is derived from the spores, and it is responsible for the production of new plant life. For instance, funaria, polytrichum, and sphagnum are examples.
Does Moss have sperm production?
Certain species of moss contain cups on the tops of their stems that produce sperm; these mosses are classified as male plants. Between the folds of her overlapping leaves, the female counterpart is carrying eggs. It is impossible for fertilization to take place without water; after the sperm have reached their full maturity, they must swim to the eggs in order to fertilize them.
What exactly is the primary role that Protonema plays?
The protonema is an enormous, branched system of multicellular filaments that are abundant in chlorophyll. It develops straight from the germination spore in most mosses and grows directly from the spore. At this point, the buildup of hormones that will later have an effect on the subsequent proliferation of newly created cells gets underway.
Where exactly does division by reduction take place in Volvox?
During the process of sexual reproduction, reduction division takes place in the sporangia of the fern, which results in the generation of many spores.
In the process of meiosis, which division is a reduction division?
Meiosis I is the name given to the initial stage of the process of nuclear division that takes place in the process of gamete creation. This was discussed earlier. Because it results in daughter cells with half the number of chromosomes as the parent cell, this type of cell division is sometimes referred to as the reduction division.
When and where in Pteridophytes does the process of reduction division take place?
The following are the conditions under which reduction division can take place in pteridophyta: The formation of spores occurs.
Where exactly may one find gemmae?
In plants, the process of gemmation is used for asexual propagation. Fungi, algae, liverworts, and mosses are common examples of organisms that have these structures. A single cell that separates from its parent and grows into a new person is referred to as a gemma (the plural form is gemmae).
Which is it: haploid or diploid Thalli?
In the life cycle of organisms that have what is known as “alternation of generations,” each phase consists of one of two distinct, free-living organisms: a gametophyte (thallus (tissue) or plant), which is genetically haploid, and a sporophyte (thallus (tissue) or plant), which is genetically diploid. Gametophytes and sporophytes can both be found in the same organism.
Are sporophytes haploid or diploid in their genetic makeup?
During the sporophyte phase, the plant develops into a body that is diploid (meaning it has two sets of chromosomes) and finally generates spores through the process of meiosis. These spores undergo mitosis, which results in the production of gamete-producing entities known as gametophytes. Haploid means that the gametophytes only have one pair of chromosomes.