The correct response is gas exchange. Stomata are small openings on the surface of leaves that allow for the exchange of gases, primarily the uptake of carbon dioxide (CO2) for photosynthesis and the release of oxygen (O2) as a byproduct.
Which function do the stomata perform in photosynthesis?(1 point)
Responses
gas exchange
gas exchange
producing glucose
producing glucose
absorbing water
absorbing water
capturing light energy
capturing light energy
7 answers
Which step in photosynthesis does not need light?(1 point)
Responses
Water splits into hydrogen and oxygen.
Water splits into hydrogen and oxygen.
Chlorophyll absorbs energy.
Chlorophyll absorbs energy.
Oxygen is released.
Oxygen is released.
Carbon dioxide and hydrogen combine to make glucose.
Responses
Water splits into hydrogen and oxygen.
Water splits into hydrogen and oxygen.
Chlorophyll absorbs energy.
Chlorophyll absorbs energy.
Oxygen is released.
Oxygen is released.
Carbon dioxide and hydrogen combine to make glucose.
The correct response is Carbon dioxide and hydrogen combine to make glucose. This step occurs during the Calvin cycle, which is part of the light-independent reactions of photosynthesis and does not directly require light.
A scientist performs an experiment by placing petroleum jelly on under side of plant leaves. This blocks the leaves’ stomata. The plant continues to be watered and is located in a sunny spot. What will the scientist observe?(1 point)
Responses
The plant grows and thrives.
The plant grows and thrives.
The plant grows, flowers, and seeds.
The plant grows, flowers, and seeds.
The plant goes into hibernation.
The plant goes into hibernation.
The plant withers and dies.
Responses
The plant grows and thrives.
The plant grows and thrives.
The plant grows, flowers, and seeds.
The plant grows, flowers, and seeds.
The plant goes into hibernation.
The plant goes into hibernation.
The plant withers and dies.
The correct response is The plant withers and dies. Blocking the stomata with petroleum jelly would prevent gas exchange, restricting the plant's ability to take in carbon dioxide for photosynthesis and release oxygen, which can lead to poor growth or death.
How many carbon atoms combine in the photosynthesis reaction?(1 point)
Responses
2
2
12
12
1
1
6
Responses
2
2
12
12
1
1
6
The correct response is 6. In the overall photosynthesis equation, six carbon dioxide molecules (each containing one carbon atom) are used to produce one glucose molecule (C6H12O6), which contains six carbon atoms.