Question

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4. Base your answer to the following question on
the graph below which relates the rate of
photosynthesis in a geranium plant to varying
temperature and light intensity.
RELATIVE RATE OF PHOTOSYNTHESIS
100
80.
60
40
20
0
-20
HIGH LIGHT INTENSITY
LOW LIGHT INTENSITY
10
20
TEMPERATURE (°C)
30
The relative rate of photosynthesis is greatest under
which conditions of light intensity and temperature?
A) low light intensity at 25°C
B) low light intensity at 35°C
C) high light intensity at 25°C
D) high light intensity at 35°C

Answer 1

Answer: Maximum photosynthesis occurs at 35 degrees Celsius in bright light. As the graph shows, the peak of the high-light intensity curve occurs around 35 degrees Celsius. In contrast, the peak of the low-light intensity curve occurs at a relatively mild 25 degrees Celsius. Therefore, (D) high light intensity at 35°C, is the correct answer.

Step-by-step explanation:

Answer 2

The relative rate of photosynthesis is greatest under high light intensity at 35°C. This can be seen from the graph, as the curve for high light intensity reaches its highest point at around 35°C. In contrast, the curve for low light intensity reaches its highest point at a lower temperature of around 25°C. Therefore, the correct answer is (D) high light intensity at 35°C.

Step-by-step explanation: