Energy flow in an Ecosystem is-
(1) Unidirectional (2) Bidirectional (3) Bark (4) Roots

Iodine is necessary for the synthesis of which hormone ?
(1) Auxin (2) Thyroxin (3) Adrenaline (4) Insulin

Which of the following are secondary metabolities ?

(A) Carbohydrates (B) Tannins (C) Proteins (D) Gums (E) Alkaloids

(1) A, D (2) B, C (3) A, D, E (4) B, D, E

Out of the following endrocine glands which are unparied ?
(1) Ovary (2) Testes (3) Pancreas (4) Adrenal

Some organs of man have their own specific functions but carry out excretion as a secondary function. Identify them.
(1) Lungs, Kidney, Nephron (2) Liver, Skin, Lungs
(3) Skin, Kidney, Intestine    (4) Intestine, Liver, Kidney