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Subject :NSO    Class : Class 4

The given graph is plotted according to the recordings of an experiment to find out the effect of temperature on the rate of photosynthesis in an aquatic plant. Based on the given graph, select the correct option.


A Photosynthesis occurs best at 35°C.
B No photosynthesis takes place at 5°C and 45°C.
C The volume of oxygen collected keeps increasing with increasing temperature.
D Volume of oxygen collected at 15°C is higher than that collected at 40°C temperature.


oxygen is not taken by plants during photosynthesis

Ans 1:

Class : Class 5
the answer can be both a and photosynthesis happen best at 35 degree cand the volume of oxygen collected in 15dc is more than 45dc.

Ans 2:

Class : Class 4

Ans 3:

Class : Class 5
Answer is A because the straight line shows in which temperature photosynthesis occurs best.

Ans 4:

Class : Class 5
the answer can be a and d

Ans 5:

Class : Class 4

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