Almost 20℅ of oxygen in the world is produced by ___?
a Sea water
b Amazon Forest
c Sahara Forest
d None of them
- How many Dynes are there in one gram weight?
- A. 993 B. 981 C. 250 D. 375...
- Hailey’s comet is visible after every_________?
- A. 84 years B. 76 years C. 1000 years D. 365 years...
- In the treatment of which disease is dialysis used?
- A. Ulcers B. Heart failure C. Kidney failure D. Brain tumour...
- Which of the following is a disease caused by deficiency of protein in children?
- Pellagra Marasmus Beri-Beri Rickets...
- The density of water maximum at _________ºC.
- A. At 0ºC. B. At 4ºC. C.At -4ºC. D.At 6ºC....