In night, when photosynthesis is stopped, plants__________.
A- take in Carbon Dioxide
B-take in Oxygen
C-give off Carbon Dioxide
D-give off Oxygen
A- take in Carbon Dioxide
B-take in Oxygen
C-give off Carbon Dioxide
D-give off Oxygen
A. River water
B. Mineral water
C. Sea water
D. None of these
A. Night blindness
B. rickets
C. hair fall
D. scurvy (more…)
A. Water
B. Chlorine
C. Carbon dioxide
D. Salt
A. Al-Khawarzimi
B. Al-Haitham
C. IsasacNewton
D. Pythagoras (more…)
A. Immunotherapy
B. Radiation
C. Surgery
D. Chemotherapy (more…)
A. John Adams
B. John William
C. John Napier
D. John Harrison (more…)
A. Tungsten
B. Iron
C. Copper
D. Silver
A. Red, Yellow, Blue
B. White, Black, Blue
C. Red, Orange, Blue
D. Red, Green, Blue (more…)
A. Nitrogen
B. Carbon dioxide
C. Methane
D. Ammonia