The density of Air is_____________?
The density of Air is_____________?
A. 0.225 kg/m3
B. 1.025 kg/m3
C. 1.225 kg/m3
D. 1.425 kg/m3
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For proper formation of teeth, __________ is essential?
For proper formation of teeth, __________ is essential?A. iodine
B. copper
C. fluorine
D. ironAll of the following foods lack vitamin C, except
All of the following foods lack vitamin C, exceptA. Cheese
B. Milk
C. Rice
D. None of theseWhich of the following is caused by bacteria?
Which of the following is caused by bacteria?A. Malaria
B. Tetanus
C. Cancer
D. None of theseTetanus, also called lockjaw, is a serious infection caused by Clostridium tetani. This bacterium produces a toxin that affects the brain and nervous system, leading to stiffness in the muscles. If Clostridium tetani spores are deposited in a wound, the neurotoxin interferes with nerves that control muscle movement
Development of calf muscles in ladies who wear high heels is a common example of:
Development of calf muscles in ladies who wear high heels is a common example of:A. Natural Selection
B. inheritance of acquired character
C. Use and disuse of organ
D. Artificial selectionWhen a ray of sunlight enters a dark room , its straight path become visible because of dust particles hanging in the air. It is because light is _________?
When a ray of sunlight enters a dark room , its straight path become visible because of dust particles hanging in the air. It is because light is _________?
A. Visible
B. Transparent
C. Invisible
D. opaque
E. None of theseSpeed of sound in water at 20 °C is___________?
Speed of sound in water at 20 °C is___________?A. 1450 m/s
B.1474 m/s
C. 1498 m/s
D. 1500+ m/s