Mrs. Lata Mohan delivered twins – Lalit and Leela in the year 2014. The twins were not of the same gender but were born on the same day and around the same time.

(a) What kind of twins are Lalit and Leela?

(b) Are they monozygotic or dizygotic twins?

(c) Mention the sex chromosomes in each of the body cells of Lalit and Leela.

Name the inner lining of the uterus.

State the location and function of the prostate gland present in the male reproductive system.

Viplav is a photographer. He finds that his vision gets blurred. This happens when he goes from taking pictures of faraway objects to reading text on his camera screen. He recalls learning about certain defects of the eyes during his school days.

(a) Name the defect of the eyes which Viplav is suffering from.

(b) Mention the type of lens that can be used to correct the above defect.