Question

In ovule meiosis occurs in
A. Archesporial cell
B. Megasporocyte
C. Megaspore
D. Parietal cell

Answer 1

Hint: Cell division is the process of dividing the parent cell into two or more daughter cells. Meiosis is classified under the cell division. It reduces the number of chromosomes in the parent cell by half and produces the four gamete cells. This process is used for the production of egg and sperm cells during reproduction. This cell division begins with the parental cell as diploid, which means it has two copies of chromosomes.

Complete answer:
Option A: Archesporial cells only function at the megaspore of the mother cell in the tenuinucellate ovules. Here it is divided into the outer parietal cells and inner primary sporogenous cells. Here periclinal division has occurred. Primary parietal layer divides and produces the concentric layers of the pollen sac wall. Option A is incorrect.
Option B: Megasporocyte is also called the mother cell megaspore. It is the diploid cell which is in plants or animals. Here the meiosis cell division occurs. It produces the four haploid megaspores. In these four haploid cells any one cell will grow in the haploid female gametophytes. Option B is correct.
Option C: Megaspore present in the heterosporous plants. It is also called macrospores. It has two types called megaspore and microspore. Megaspore grows into the female gametophytes and microspore grows into the male gametophytes. Mitotic cell division occurs in the megaspore. Option C is incorrect.
Option D: Parietal cell segregates the hydro chloric acid which is in the stomach. It is the epithelial cell and also produces intrinsic factors. It is available in the gastric glands. It is produced by the diminishment of glycolic, production of cytoplasmic tubulovesicles in increase in number. Option D is incorrect.

Hence, Option B is the correct answer.

Note:
Meiosis cell division is important in ensuring all organisms which are produced by sexual reproduction. It is used to provide the correct number of chromosomes for cell development. This cell division also provides genetic variation. This genetic variation is occurring due to the way of recombination process. In humans this cell division provided the genetic diversity and proper condition for reproductive success. It is used to develop the sex cells.