Question

1. The graph below shows the variation of rate
of photosynthesis with light intensity for
different levels of carbon dioxide.

Rate of
Photosynthesis

1% carbon dioxide
concentration

0.04% carbon dioxide
concentration

light intensity

After analyzing the graph a student writes

the following statements.

(1) The rate of photosynthesis increases
linearly with light intensity.

(II) The rate of photosynthesis first increases
linearly with increase in light intensity
and then becomes a constant.

(III) For a given light intensity, the rate of
photosynthesis will be more if carbon
dioxide concentration is less.

(IV) For a given light intensity, the rate of
photosynthesis does not depend upon
the carbon dioxide concentration.

Choose from the following which of
the following would be the correct
statement(s).

^(a) Only I

(c) Both I and III

(b) Only II

(d) Both II and IV

Answer 1

Answer:

c

Explanation:

because the rate of photosynthesis is directly proportional to light if light increase photosynthesis increase and at some time interval it is constant