Class X Science
Subject: Biology___Objective Question
Chapter 2: Control and Coordination
Q. 1. Control and Coordination(A) light
(B) Taste
(C) Smell
(D) Touch
Right Ans:- Taste
Q. 2. The gap between two neurons is called _____
(A) Synapse
(B) Synthesise
(C) Dendron
(D) Axon
Right Ans:- Synapse
Q. 3. Involuntary actions including blood pressure, salivation and vomiting are controlled by the __________ in the hind-brain.
(A) Medals
(B) Cerebellum
(C) Medulla
(D) Cerebrum
Right Ans:- Medulla
Q. 4. A potted plant kept in a room tends to bend towards the direction of light. This movement is called
(A) Photographism
(B) Photonastism
(C) Photoperiodism
(D) Phototropism
Right Ans:- Phototropism
Q. 5. _________ is a growth inhibiter hormone in plants
(A) Auxin
(B) Cytokinin
(C) Abscicic acid
(D) Gibberellic acid
Right Ans:- Abscicic acid
Q. 6. The endocrine organ present in human female but not in human male is
(A) Testis
(B) Ovary
(C) Pituitary gland
(D) Thymus
Right Ans:- Ovary
Q. 7. If there is a deficiency of growth hormone the child becomes _____
(A) Blind
(B) Mentally retarded
(C) Giant
(D) Dwarf
Right Ans:- Dwarf
Q. 8. People living in coastal areas suffer less from goiter. This is because
(A) They eat sea food
(B) They drink sea water
(C) They bathe in sea water
(D) All of the above
Right Ans:- They eat sea food
Q. 9. The upward or down ward movement of shoot and root respectively is influenced by gravity. Such movement is called
(A) Gravity movement
(B) Gravitytropism
(C) Geotropism
(D) Gravitism
Right Ans:- Geotropism
Q. 10. The direction of impulse in a typical neuron is
(A) Axon to dendron
(B) Dendron to axon
(C) Both a and b are correct
(D) Both a and b are wrong
Right Ans:- Both a and b are correct
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