Which of the following is not an after-effect of water stress?
1. Reducing CO₂ availability
2. Closure of stomata
3. Reducing metabolic activity
4. Increased surface area

Water stress may cause which of the following?
a. Closure of stomata
b. Wilting of leaf
c. reducing metabolic activity
d. all of these

Water stress may reduce availability of which factor?
a. O2
b. Nutrients
c. Light
d. CO2

Which plants can tolerate higher temperature?
a. C3
b. C2
c. C4
d. Both

Temperature will affect which process more sensitively?
a. Dark process
b. Non Cyclic Process
c. Cyclic Process
d. Splitting of water

Which of the following plants are grown in green house by exploiting a fact that higher CO2 leads more productivity?
a. Tomatoes
b. Papaya
c. Cycas
d. Pomegranate

C3 plants show saturation at----- ul/L.
a. 450
b. 360
c. 400
d Both a and b

At low light conditions, which plant responds to high CO2 conditions?
a. C3
b. C4
c. Neither
d. Both

What is the major limiting factor for photosynthesis?
a. CO2
b. Water
c. Sunlight
d. Chlorophyll

Light is a limiting factor for plants in shade-
a. as they do not get full sunlight
b. as they do not get at most 10 % of full sunlight
c. as they do not get at least 50 % of full sunlight
d. as they do not get at most 70% full sunlight