Test-MCQ Class 10-NCERT -Science-Chapter 7-Test-2

1. Which is the correct sequence of the components of a reflex arc?

2. Which of the following statements are true?

(i) Sudden action in response to something in the environment is called reflex action
(ii) Sensory neurons carry signals from spinal cord to muscles
(iii) Motor neurons carry signals from receptors to spinal cord
(iv) The path through which signals are transmitted from a receptor to a muscle or a gland is called reflex arc

3. Which of the following statements are true about the brain?
(i) The main thinking part of brain is hind brain
(ii) Centres of hearing, smell, memory, sight etc are located in fore brain.
(iii) Involuntary actions like salivation, vomiting, blood pressure are controlled by the medulla in the hind brain
(iv) Cerebellum does not control posture and balance of the body

4. Posture and balance of the body is controlled by

5. Spinal cord originates from

6. The movement of shoot towards light is

7. Artificial ripening of fruit is carried out by

8. The main function of abscisic acid in plants is to

9. Which of the following is not associated with growth of plant?

10. Iodine is necessary for the synthesis of which hormone?

11. Choose the incorrect statement about insulin

12. Select the mis-matched pair

13. The shape of guard cells changes due to change in the

14. The growth of tendril in pea plants is due to

15. The growth of pollen tubes towards ovules is due to

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