Q. The reason/s for the decrease in biodiversity is/are -
1) habitat pollution and destruction only
2) introduction of exotic species only
3) over exploitation only
4) All of the above
Q. A communication satellite is launched from the surface of earth along the direction -
1) South to North
2) North to South
3) West to East
4) East to West
Q. Man and Biosphere programme was started by -
1) UNICEF
2) UNESCO
3) IMF
4) WHO
Q. Which one of the following pairs is not correctly matched?
1) Light year - Unit of distance
2) Parsec - Unit of time
3) Decibel - Unit of sound intensity
4) Hertz - Unit of frequency
Q. Consider earth as a sphere. If it is contracted suddenly to half of its radius without changes in its shape and mass, the day of 24 hours will now be of -
1) 24 hours
2) 18 hours
3) 12 hours
4) 6 hours
Q. Which one of the following elements does not occur in a free state in nature?
1) Carbon
2) Silver
3) Silicon
4) Sulphur
Q. Which one of the following pairs of vitamins act as antioxidants?
1) Vitamin A and Vitamin C
2) Vitamin C and Vitamin E
3) Vitamin B2 and Vitamin D
4) Vitamin E and Vitamin K
Q. Khaira disease of Rice crop is due to the deficiency of -
1) Ca
2) Zn
3) Fe
4) Cu
Q. Arrange the following species in chronological order of their evolution -
1. Amphibia
2. Fishes
3. Reptiles
4. Birds
Select the correct answer from the code given below -
1) 1, 2, 4, 3
2) 2, 1, 4, 3
3) 2, 1, 3, 4
4) 4, 1, 3, 2
Q. Formation of RNA from DNA is called -
1) Translation
2) Translocation
3) Transition
4) Transcription
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