6. The major chemical compound found in kidney stones is-
A. Urea
B. Calcium Oxalate
C. Calcium Carbonate
D. Calcium Sulphate
7. In the eye donation which part of the eye is transplanted from the donor?
A. Cornea
B. Lens
C. Whole Eye
D. Retina
8. Which of the following elements are present in all proteins?
A. Oxygen
B. Carbon
C. Hydrogen
D. All of these
Read More: Amazing Facts of Human Body
9. Among the following which one is not an ape?
A. Orangutan
B. Gibbon
C. Gorilla
D. Langur
10. How do most insects respire?
A. Through Lungs
B. Through Gills
C. Trachea System
D. None of these
Read More: Biological Classification of Organisms