Question

using an electronic sensor to measure the amount of oxygen, how would you expect it to change around a sugar cane plant on a sunny day​

Answer 1

Question:

Using an electronic sensor to measure the amount of oxygen, how would you expect it to change around a sugar cane plant on a sunny day​

Explanation:

Respiration and photosynthesis

Plants respire during the day and night, but they only photosynthesise during the day when it is light:

Process Day Night

Respiration ✓ ✓

Photosynthesis ✓ ✗

Remember the equations for aerobic respiration and photosynthesis:

C6H12O6 + 6O2 → 6CO2 + 6H2O (aerobic respiration)

6CO2 + 6H2O → C6H12O6 + 6O2 (photosynthesis)

In terms of reactants and products, they are the reverse of each other. In terms of gas exchange:

Process Carbon dioxide Oxygen

Respiration Out In

Photosynthesis In Out

Net gas exchange

The net (overall) effect depends on the time of day and the light intensity. Photosynthesis doesn’t occur at night. When there is no photosynthesis, there is a net release of carbon dioxide and a net uptake of oxygen.

If there is enough light during the day, then:

the rate of photosynthesis is higher than the rate of respiration

there is a net release of oxygen and a net uptake of carbon dioxide

Answer 2

Answer:

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