IAS 2002 — Biology

With reference to the human body, consider the following statements: 1. The production of somatotropin goes up when a person exercises. 2. Men's testes produce progesterone. 3. Women's adrenal glands secrete testosterone. 4. Stress causes the adrenals to release very less amount of cortisol than usual. Which of these statements are correct?

Assertion (A): Drinking of whisky increases the frequency of urination. Reason (R): Alcohol intake speeds up the secretion of vasopressin in the body.

Assertion (A): Human diet should compulsorily contains glycine, serine and tyrosine. Reason (R): Essential amino acids cannot be synthesized in the human body.

Which one of the following is monogamous?

Which one of the following Statements IS correct?

When one gene controls two or more different characters simultaneously, the phenomenon is called

In the context of organic evolution the loss of limbs in snakes is explained by the phenomenon of

Among living organisms, which one of the following is the most responsible factor for bringing about the origin of a new species?

With reference to the blood in a normal person, which one of the following statements is correct?

In a bisexual flower, if androecium and gynoecium mature at different times, the phenomenon is known as

Consider the following plants 1. Bougainvillea 2. Carnations. 3. Cocoa 4. Grapes Which of these plants are propagated by stem cuttings?

Which one of the following statements is not correct?