331. The number of alveoli in human lungs is estimated to be around __.
A. 150 Million
(B. 500 Million)
C. 800 Million
D. 1 Billion
332. New alleles can be introduced into a population gene pool by __.
A. Mutation
B. Natural selection
C. Gene flow
(D. Both A & C)
333. Among the following, which one is a diploblastic organism?
A. Squid
(B. Hydra)
C. Crab
D. Earthworm
334. Which of the following toxic metals is extensively present in the newspaper?
A. Mg
B. Cd
(C. Pb)
D. Hg
335. Which of the following viruses has caused thousands of deaths globally as an emergent virus?
A. Mers
B. Sars
C. OC43
(D. HKUT)
336. Calvin was awarded the Nobel Prize in which year?
A. 1958
B. 1959
C. 1960
(D. 1961)
337. Lock and key model of enzyme action is proposed in which year?
(A. 1894)
B. 1895
C. 1896
D. 1897
338. Spider bite can also cause?
A. Apoptosis
(B. Necrosis)
C. Meiosis
D. Mitosis
339. Essential constituent of the plant cell is which type of carbohydrates?
A. Sucrose
B. Starch
C. Lignin
(D. Cellulose)
340. Quinine is a _ resource:
A. Mineral
B. Agricultural
(C. Forest)
D. None of these
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