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Question-1 Adolescent age is between the years -

(A) 11 to 18	(B)11 to 25
(C)10 to 15	(D) 8 to 20

Question-2 Gigantism and dwarfism are hormone disorders related with the endocrine gland/glands -

(A) Pituitary and thyroid glands.	(B)Pituitary gland alone.
(C)Thyroid gland alone	(D)Pancreas and adrenal glands.

Question-3 How are the last pair of chromosome different in their function in Human beings?

(A) They give us strength.	(B) They influence our behaviour
(C)They gives us long life.	(D)They influence/ determine our sex.

Question-4 Ovum or egg is produced by

(A) Uterus	(B)Ovary
(C)Fallopian tube	(D)Testes

Question-5 Chemicals produced by ants which help them to coordinate each other are known as

(A) Hormones	(B)Enzymes
(C)Coordinators	(D)Pheromones.

Question-6 The function of Insulin is to -

(A) Convert excess blood glucose to its stored form, glycogen.	(B) Increase glycogen to glucose.
(C)Increase glucose in blood.	(D)Convert glucose to sugar

Question-7 Human male produces

(A) One type of sperm.	(B) Two types of sperms.
(C)Three types of sperms.	(D)Four types of sperms.

Question-8 High blood glucose level may be due to

(A) Low insulin production	(B)High insulin production
(C)High thyroxin production	(D)High Oestrogen production

Question-9
Metamorphosis is delayed when the water in which tadpoles live is deficient of the mineral -

(A) Iron	(B)Iodine
(C) Glucose	(D)Salt

Question-10 Hormone thyroxin needs __________ for its production.

(A) Iron	(B)Calcium
(C) Iodine	(D)Phosphorus

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Std 8

CBSE

Practice in Related Chapters
Reproduction in Animals
Microorganisms: Friend and Foe
Reaching the Age of Adolescence
Cell - Structure and Functions
Conservation of Plants and Animals
Crop Production & Management