Question

25
mckennon, jason
rate of photosynth
0 10 20 30 40 50
temperature (°c)
which statement best describes a change when the temperature increases from 10°c to 30°c?
a the plant absorbs more water and releases more carbon dioxide.
b the plant absorbs more glucose and releases a larger amount of oxygen.
c the plant increases the use of oxygen and the production of carbon dioxide.
d the plant increases the use of carbon dioxide and the production of glucose.

Explanation:

1. Analyze the graph: The graph shows the rate of photosynthesis increasing from 10°C to 30°C.
2. Recall photosynthesis process: Photosynthesis uses \(CO_2\) and produces glucose (and \(O_2\)).
3. Evaluate options:

• Option A: Photosynthesis doesn't release \(CO_2\) (that's respiration), and water absorption isn't directly tied to this temp - photosynthesis rate increase here. Eliminate.
• Option B: Plants produce glucose (don't absorb it) in photosynthesis. Eliminate.
• Option C: Using \(O_2\) and producing \(CO_2\) is respiration, not photosynthesis. Eliminate.
• Option D: As photosynthesis rate increases (from graph), the plant uses more \(CO_2\) (reactant) and produces more glucose (product). This matches.

Answer:

D. The plant increases the use of carbon dioxide and the production of glucose.