- Which hormone is secreted by Tapetum?
- Is Microsporangia and Microsporangium same?
- What do pollen grains contain?
- What is the study of pollen grains called?
- Which of the following statement is correct Sporogenous tissue is haploid?
- Who helps in dehiscence of anther?
- How many types of Tapetum are there?
- What happens to Tapetum on maturity?
- What is the ploidy of Chalaza?
- What is the ploidy of Sporogenous tissue?
- What is Sporogenous tissue?
- Does Endothecium produce Microspore?
- What is the ploidy of embryo?
- What is the ploidy level of antipodal cells?
- What is the main function of Tapetum?
- What does Microsporangium produce?
- What is the function of Sporogenous tissue?
- What is the ploidy of Synergids?
Which hormone is secreted by Tapetum?
auxinTapetum cells provide nutrients, but auxin produced in tapetum cells is not sufficient to support early stages of pollen development.
In contrast, auxin synthesized in sporophytic microsporocytes is necessary and sufficient for male gametophytic development..
Is Microsporangia and Microsporangium same?
Microsporangia are the structures that give rise to male gametes or microspores or pollen grains. Microsporangia is the plural form while microsporanium in singular. Megasporangiaare the structures that give rise to female gametes or megaspores or ovules.
What do pollen grains contain?
Each pollen grain contains vegetative (non-reproductive) cells (only a single cell in most flowering plants but several in other seed plants) and a generative (reproductive) cell. In flowering plants the vegetative tube cell produces the pollen tube, and the generative cell divides to form the two sperm cells.
What is the study of pollen grains called?
KEY WORDS: Pollen, entomopalynology, forensics, aerobiology. Palynology is the study of pollen grains produced by seed plants (angiosperms and gymnosperms) and spores (pteridophytes, bryophytes, algae and fungi).
Which of the following statement is correct Sporogenous tissue is haploid?
Explanation: Sporogenous tissue is always diploid, endothecium is second layer of another wll and perform the function of protection and help in dehiscence of anther to release the pollen.
Who helps in dehiscence of anther?
Assertion : Endothecium layer of anther wall plays an important role in dehiscence of anther Reason : The presence of fibrous bands and defferential expansion of inner and outer tangential walls of endothecial cells cause dehiscence of anther.
How many types of Tapetum are there?
Two main types of tapetum are widely recognised: secretory and plasmodial, although intermediate types occur, such as the “invasive” tapetum described inCanna.
What happens to Tapetum on maturity?
Answer: Yes. at maturity, dehydration of anther happen leads to dehicence of anther to release pollen grains.
What is the ploidy of Chalaza?
It includes a strand of undertaking tissue main from the placenta into the chalaza. Funicle has ploidy 2n. Female gametophytes additionally referred to as an embryo sac (produced via means of meiotic department from Megaspore mom cell) has ploidy n. Thus, the right answer is option D.
What is the ploidy of Sporogenous tissue?
The sporogenous tissue is diploid in nature. The sporogenous cells undergo further differentiation & division to form haploid microspores.
What is Sporogenous tissue?
Often referred to as the pollen sac, anthers are bi-lobed structures that typically rest atop long slender stalks called filaments. … The anthers are comprised of tissues that contain spore-producing cells called microsporocytes.
Does Endothecium produce Microspore?
Endothecium is the wall around the microsporangium, which provide protection and help in dehiscence of anther to release the pollen. The sporogenous tissue is diploid. It undergoes meiotic division to form microspore tetrads. … It nourishes the pollen grains.
What is the ploidy of embryo?
Answer: The ploidy of embryo sac is Haploid. The number of set of chromosomes is called as Ploidy. The embryo sac is female gametophyte. … The embryo sac has three parts called as egg apparatus, secondary nucleus and antipodal. The antipodas consists of three cells which are haploid.
What is the ploidy level of antipodal cells?
DNA content in differentiated antipodal cells has been determined by a cytophotometric analysis; in the case of a mature embryo sac, the ploidy of antipodal cells varied from 8 to 32C.
What is the main function of Tapetum?
The tapetum is a specialised layer of nutritive cells found within the anther, of flowering plants, where it is located between the sporangenous tissue and the anther wall. Tapetum is important for the nutrition and development of pollen grains, as well as a source of precursors for the pollen coat.
What does Microsporangium produce?
The microsporangium contains microspore mother cells, which divide by meiosis to produce haploid microspores. The microspores develop into male gametophytes that are released as pollen. The megasporangium contains megaspore mother cells, which divide by meiosis to produce haploid megaspores.
What is the function of Sporogenous tissue?
Sporogenous tissue is located at the centre of each microsporangium in a young anther. With the development of the anther, the sporogenous cells undergo meiotic division to form microspore tetrads. Each sporogenous cell is known as the pollen mother cell. The anther matures and releases the pollen grains.
What is the ploidy of Synergids?
As these 8 nuclei are derived from the mitotic divisions of the haploid megaspore, these are haploid and thus, the synergids are haploid cells.