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221. Which one is positive feed back mechanism?
A. Sexual stimulation
B. Allosteric inhibition
C. Blood pressure
D. Perspiration
Explanation:
222. Which one is liable to change with new discoveries?
A. Hypothesis
B. Theory
C. Scientific fact
D. Scientific principle
Explanation:
223. Vaccine developed by Pasteur was against
A. Chicken Pox
B. Anthrax
C. Rabies
D. Both B and C
Explanation:
224. Microscope used by Leeuwenhoek, was
A. Simple
B. Compound
C. Dark phase
D. Interphase
Explanation:
225. Norman Borlaug was given Nobel Prize in 1970 for
A. Discovery of dwarf Rice
B. Development of dwarf wheat varieties
C. Ushering in green revolution
D. Both B and C
Explanation:
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