Practicing Success

Target Exam

CUET

Subject

Biology

Chapter

Sexual Reproduction in Flowering Plants

Question:

Which one of the following statement is correct?

Options:

The sporogenous tissue is haploid.

The endothecium is responsible for the production of microspores.

The tapetum provides nourishment to the developing pollen.

The tough outer layer of pollen is known as the intine

Correct Answer:

The tapetum provides nourishment to the developing pollen.

Explanation:

The correct answer is Option (3)-The tapetum provides nourishment to the developing pollen.

(c) The tapetum provides nourishment to the developing pollen. This is correct

The tapetum is a specialized tissue found within the anther of a flower, specifically surrounding the developing microspores. It plays a crucial role in the development and nourishment of the pollen grains. The tapetum provides essential nutrients, proteins, and enzymes to support the development and maturation of the pollen grains.

 The incorrect statements are :

(a) The sporogenous tissue is haploid. This is incorrect.

The sporogenous tissue is a specialized tissue made up of diploid cells found within the anther of a flower. It is responsible for producing microspores, which eventually develop into pollen grains. During the process of microsporogenesis, the cells of the sporogenous tissue undergo meiosis, a type of cell division that results in the production of haploid cells. These haploid cells are the microspores, which will later undergo further development to become mature pollen grains.

(b) The endothecium is responsible for the production of microspores. This is incorrect.

The endothecium is a layer of cells located within the anther of a flower, below the epidermis. It helps in the dehiscence of anther. The sporogenous tissue, as mentioned earlier, undergoes meiosis to produce haploid microspores.

(d) The tough outer layer of pollen is known as the intine. This is incorrect.

The pollen grains represent the male gametophytes. Pollen grains are generally spherical measuring about 25-50 micrometers in diameter. It has a prominent two-layered wall. The hard outer layer called the exine is made up of sporopollenin which is one of the most resistant organic material known.The inner wall of the pollen grain is called the intine. It is a thin and continuous layer made up of cellulose and pectin.