Gaseous Exchange in Plants

Q. What is the effect of carbon dioxide on the rate of respiration in plants?

1. Rate of respiration in plants decreases with increase in $C{O}_2$ concentration
   
2. Rate of respiration first increases then decreases with increase in $C{O}_2$ concentration
   
3. Rate of respiration in plants increases with increase in $C{O}_2$ concentration
4. Carbon dioxide has no effect on respiration rate

Q.

Fill in the blanks by choosing suitable words from the brackets:

c. The greater the stomatal aperture, the ______ is the rate of transpiration. (greater/lesser)

Q.

Name the process/term for the statements given below:

Fine pores present on the leaf surface through which transpiration occurs.