Question 1. Consider the following statements.
- Assertion (A): During sleep, bright light is undesirable.
- Reason (R): In bright light, production of melatonin in the body is considerably increased.
Select your answer using the codes given below.
(A) (A) is false, but (R) is true
(B) (A) is true, but (R) is false
(C) Both (A) and (R) are true, but (R) is not the correct explanation of (A)
(D) Both (A) and (R) are true and (R) is the correct explanation of (A)
Question 2. Consider the following plants.
- Bougainvillea
- Carnations
- Cocoa
- Grapes
Which of these plants are propagated by stem cuttings?
(A) 1, 2, 3 and 4
(B) 1, 2 and 4
(C) 2, 3 and 4
(D) 1 and 2
Question 3. Consider the following statements.
- Sweet orange plant is propagated by grafting technique.
- Jasmine plant is propagated by layering technique.
Which of the statement(s) given above is/are correct?
(A) Neither 1 nor 2
(B) Both 1 and 2
(C) Only 2
(D) Only 1
Question 4. Consider the following statements.
- Tapeworm is a hermaphrodite.
- Roundworm has separate sexes.
- Filaria is caused by a nematode.
- Guinea-worm is an annelid.
Which of these are correct?
(A) 3 and 4
(B) 2, 3 and 4
(C) 1, 2 and 3
(D) 1 and 2
Question 5. Which one of the following parts of the human brain is the regulating centre for swallowing and vomiting?
(A) Pons
(B) Medulla oblongata
(C) Cerebrum
(D) Cerebellum
Question 6. Plants are formed like parent plant from_______.
(A) Seeds
(B) Both of the above
(C) Cut stem
(D) None of the above
Question 7. Identify parasite of the following.
(A) Sunflower
(B) Bladderwort
(C) Cuscuta
(D) Pitcher plant
Question 8. The normal temperature of the human body is_______.
(A) 367 K
(B) 98ºC
(C) 37ºC
(D) None of these
Question 9. Which is an atrocious animal?
(A) Tortoise
(B) Otter
(C) Whale
(D) Penguin
Question 10. When ants bite, they inject_______.
(A) Stearic acid
(B) Formic acid
(C) Methanol
(D) Glacial acetic acid
Question 11. The temperature of a normal human body is_______.
(A) 98.4º F
(B) 98º F
(C) 98.8º F
(D) None of these
Question 12. Which part of human body maintain the body temperature?
(A) Kidney
(B) Liver
(C) Lungs
(D) Heart