Practicing Success

Target Exam

CUET

Subject

Biology

Chapter

Sexual Reproduction in Flowering Plants

Question:

Read the following statements.

I. The generative cell is larger and contains a significant amount of food reserves.

II. The vegetative cell is smaller and is suspended within the cytoplasm of the generative cell.

III. Young anthers of angiosperms provide the opportunity to observe different stages of reductional divisions.

IV. The hilum is the point of connection between the ovule and the funicle.

Choose the option with the correct set of statements.

Options:

III and IV

II and IV

I and II

I and III

Correct Answer:

III and IV

Explanation:

The correct answer is Option (1)-III and IV

I. The generative cell is larger and contains a significant amount of food reserves. This is incorrect.

The generative cell is small and floats in the cytoplasm of the vegetative cell. It is spindle-shaped with dense cytoplasm and a nucleus.

II. The vegetative cell is smaller and is suspended within the cytoplasm of the generative cell. This is incorrect.

The vegetative cell is bigger, has abundant food reserve and a large irregularly shaped nucleus.

III. Young anthers of angiosperms provide the opportunity to observe different stages of reductional divisions. This is correct.

Angiosperms, or flowering plants, undergo a process called meiosis in the anther to produce haploid microspores. These microspores further develop into pollen grains. The anthers contain sporogenous tissue, which undergoes meiotic divisions resulting in the production of microspores. The observation of young anthers allows researchers and scientists to study and understand the various stages of reductional divisions that occur during meiosis. This provides valuable insights into the genetic and reproductive processes of angiosperms.

IV. The hilum is the point of connection between the ovule and the funicle. This is correct.

The hilum is a scar on the surface of an ovule where it was attached to the funicle. The funicle is a stalk that attaches the ovule to the ovary. The hilum is important because it is the point where the pollen tube enters the ovule during fertilization.