Biology - Study Mode

[#596] Which of the following cells produce antibodies?
Correct Answer

(A) Plasma cells

Explanation

Solution: Plasma cells produce antibodies.

[#597] Which group of organisms serves as the best indicator of pollution in a water body?
Correct Answer

(A) Plankton

Explanation

Solution: Plankton serves as the best indicator of pollution in a water body.

[#598] In female a small portion oviduct is removed and cut end is ligated by surgical operation is called
Correct Answer

(B) Tubectomy

Explanation

Solution: Surgical methods, also called as sterilisation, are generally advised for the male/female partner as a terminal method to prevent any more pregnancies.
Surgical intervention blocks gamete transport and thereby prevent conception. Sterilisation procedure in the male is called as vasectomy and that in the female, tubectomy.

[#599] Which of the following would cause gene flow?
Correct Answer

(A) Individuals moving into population

Explanation

Solution: Gene flow means migration of genes from one to another. This gene flow is caused by individuals moving into population.

[#600] Oral pills of birth control prevent
Correct Answer

(A) Ovulation

Explanation

Solution: Oral contraceptives (birth-control pills) are used to prevent pregnancy. Estrogen and progestin are two female sex hormones. Combinations of estrogen and progestin work by preventing ovulation (the release of eggs from the ovaries).