Question

Which of the following is correct?
A. Tapetum nourishes the developing pollen
B. Hard outer layer of pollen is called intine
C. Sporogenous tissue is haploid
D. Endothelium produces microspores

Answer 1

Hint: In flowering plants, the reproductive organs are in the flower. Meiosis and fertilization are essential processes in the sexual cycle of flowering plants. Sexual reproduction consists of two generations - sporophyte and gametophyte by nutritionally independent extremely short haploid phase. The sporophyte generation begins when an egg nucleus unit a sperm nucleus, producing an embryo, and the second sperm nucleus fuses with the polar nuclei producing triploid endosperm and continues with the development of seeing the seedling, mature plant, and flowers.

Complete answer:
A) Tapetum nourished the developing pollen: It is generally surrounded by four wall layers: the epidermis, endothecium, middle layers, and the tapetum. The outer three wall layers perform the function of protection and help in the dehiscence to release the pollen. The innermost layer is called the tapetum. It nourishes the developing pollen grains. Cells of the tapetum have dense cytoplasm and have more than one nucleus. A mature anther wall comprises an epidermis followed by a later endothecium, two or three middle layers, and a single-layered tapetum. The tapetum is composed of a single layer of cells and, characterized by dense cytoplasm. The tapetum is of two types: secretory and amoeboid tapetum. Tapetum supplies nutrients to the developing microspores. It synthesized an enzyme that degrades the callose wall for the release of microspores present in the tetrad. Tapetum also plays an important role in pollen wall formation.
B) The hard outer layer of pollen is called inline: The inner wall of the pollen grains is called the in time. Intine is thin and continuous. Made up of lignin and pectin. The cytoplasm of the pollen grain is surrounded by a plasma membrane.
C) Sporogenous the issue is haploid: sporophyte tissues captain a diploid chromosome number. The flower captain spore-forming organs called anthers and ovaries. Anthers and the ovaries produce haploid (n) microspores and megaspores, respectively. This, alternation of sporophytic and gametophytic generations occur during the life cycle of flowering plants, and this form of the life cycle is termed the life cycle of flowering plants, and this form of the offer cycle is termed as a haplodiplontic life cycle.
D) Endothelium produces microspores: In angiosperms, the layers of cells lying beneath the epidermis if the wall is the other. As the other mature thickenings after development in the cell walls of the endothelium probably aiding dehiscence.
So, the correct answer is “Option A”.

Note: Microspore tetrad developed from sporogenous tissue. Each pollen is a potential pollen or microspore mother cell (PMC). Microsporogenesis is the process of the formation of microspores. The microspores are arranged in a bundle of four cells and are known as microspore.