What is the major limiting factor for photosynthesis?
1. CO₂
2. Water
3. Sunlight
4. Chlorophyll

At low light conditions, which plant responds to high CO₂ conditions?
1. C₃
2. C₄
3. Neither
4. Both

Which plants show saturation at 360 ul/L?
1.C₃
2. C₄
3. C₂
4. Both 1 and 2

Which of the following plants are grown in green house by exploiting a fact that higher CO₂ leads more productivity?
1. Tomatoes
2. Papaya
3. Cycas
4. Pomegranate

Temperature will affect which process more sensitively?
1. Dark process
2. Non Cyclic Process
3. Cyclic Process
4. Splitting of water

Which plants can tolerate higher temperature?
1. C₃
2. C₂
3. C₄
4. Both

Water stress may reduce availability of which factor?
1. O₂
2. Nutrients
3. Light
4. CO₂

Water stress may cause which of the following?
1. Closure of stomata
2. Wilting of leaf
3. reducing metabolic activity
4. all of these

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

Light is a limiting factor for plants in shade-
1. as they do not get full sunlight
2. as they do not get at most 10 % of full sunlight
3. as they do not get at least 50 % of full sunlight
4. as they do not get at most 70% full sunlight