Subject :NSO Class : Class 7
The given graph shows
net uptake and net release of oxygen by a
plant kept in open over a 24 hour period.
Which of the following holds true regarding the
given graph?
A At 0800 hour, the oxygen taken up by plant in
respiration is equal to oxygen released by it during
photosynthesis.
B Plant is respiring throughout the 24 hour period but
it is photosynthesising only between 0600 hours to
1800 hours.
C Assuming that the plant has the same respiration
rate throughout 24 hour period, 70 mg of oxygen is
produced by plant at 1600 hour.
D The highest rate of photosynthesis occurs at
1200 hour.
Ans 1:
Class : Class 10