As the concentration of CO2 increases, the rate of photosynthesis…..
a) decreases
b) increases
c) doesn’t affect
d) none of these
As the concentration of CO2 falls down, the rate of photosynthesis…..
a) decreases
b) increases
c) doesn’t affect
d) none of these
As the concentration of CO2 falls down, the rate of photosynthesis…..
a) decreases
b) increases
c) doesn’t affect
d) none of these
The concentration of CO2 in plants decreases due to…….
a) opening of stomata
b) closing of stomata
c) absorption of water
d) none of them
The percentage of carbon dioxide in air is……
a) 78 %
b) 21 %
c) 0.03 %
d) 0.9 %
Which of the following process/es maintain the level of carbon dioxide in air?
a) photosynthesis
b) respiration
c) both of them
d) none of them
