A. Provide striking surface to the wings for flying
B. Provide insulation for preserving body heat
C. Impart coloration for species as well as sex recognition
D. Make the body surface waterproof
A. Carbolic acid
B. Sulfuric and nitric acids
C. Acetic acid
D. Oxalic acid
A. Graphite
B. Tungsten
C. Nichrome
D. Chromium
A. A decrease in the rate of photosynthesis
B. An increase in the rate of photosynthesis
C. A decrease in the rate of respiration
D. No effect on either photosynthesis or respiration
A. Water expands on freezing
B. Temperature outside the bottle is less than that inside the bottle
C. Bottle contracts at freezing point
D. None of the above
A. Scatters blue light
B. Has actual blue cover
C. Transmits blue light
D. Reflects blue light
A. A single force
B. A pair of forces acting along the same line and in opposite direction
C. Two forces acting along different lines and in opposite direction
D. Two forces acting in the same direction
A. 63% lead and 37% aluminium
B. 63% tin and 37% aluminium
C. 63% lead and 37% tin
D. 63% tin and 37% lead