1. One Cubic mm of blood contains _____ RBC
Answer: 5 Million
2. The Life span of RBC _____
Answer: 120 Days
3. The lung contracts and expands _____ times in minute
Answer: 12-15
4. How many bones in human body?
Answer: 206
5. The largest gland in human is _____
Answer: Liver
6. The atmosphere contain about ____ Oxygen
Answer: 78 %
7. What is works of Rhizobium?
Answer: Nitrogen Fixation
8. Acid rain is due to the formation of _____
Answer: Nitric Acid
9. The rolling of thunder is due to _____
Answer: Multiple Reflection
10. The Greenwich meridian is taken as the prime meridian with the origin of _____
Answer: 0°
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