The function that stomata perform in photosynthesis is gas exchange. Stomata are small openings on the surfaces of leaves that allow for the exchange of gases; they enable carbon dioxide to enter the leaf for photosynthesis and allow oxygen, a byproduct of photosynthesis, to exit.
Which function do the stomata perform in photosynthesis?
Responses
absorbing water
absorbing water
producing glucose
producing glucose
gas exchange
gas exchange
capturing light energy
9 answers
Which step in photosynthesis does not need light?(1 point)
Responses
Oxygen is released.
Oxygen is released.
Water splits into hydrogen and oxygen.
Water splits into hydrogen and oxygen.
Carbon dioxide and hydrogen combine to make glucose.
Carbon dioxide and hydrogen combine to make glucose.
Chlorophyll absorbs energy.
Responses
Oxygen is released.
Oxygen is released.
Water splits into hydrogen and oxygen.
Water splits into hydrogen and oxygen.
Carbon dioxide and hydrogen combine to make glucose.
Carbon dioxide and hydrogen combine to make glucose.
Chlorophyll absorbs energy.
The step in photosynthesis that does not need light is Carbon dioxide and hydrogen combine to make glucose. This process occurs during the Calvin cycle, which is a part of photosynthesis that takes place in the stroma of chloroplasts and does not require light directly.
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 withers and dies.
The plant withers and dies.
The plant goes into hibernation.
The plant goes into hibernation.
The plant grows, flowers, and seeds.
Responses
The plant grows and thrives.
The plant grows and thrives.
The plant withers and dies.
The plant withers and dies.
The plant goes into hibernation.
The plant goes into hibernation.
The plant grows, flowers, and seeds.
The scientist will observe that the plant withers and dies. By blocking the stomata with petroleum jelly, the plant cannot effectively exchange gases; it cannot take in carbon dioxide for photosynthesis or release oxygen, leading to poor gas exchange and ultimately resulting in the plant's decline. Additionally, the inability to regulate water loss through transpiration can also contribute to the plant's wilting and death.
How many carbon atoms combine in the photosynthesis reaction?(1 point)
Responses
1
1
6
6
2
2
12
Responses
1
1
6
6
2
2
12
In the photosynthesis reaction, 6 carbon atoms combine. The overall equation for photosynthesis can be represented as:
\[ 6 \text{CO}_2 + 6 \text{H}_2\text{O} \rightarrow \text{C}6\text{H}{12}\text{O}_6 + 6 \text{O}_2 \]
In this reaction, six molecules of carbon dioxide (each containing one carbon atom) are used to produce one molecule of glucose (\( \text{C}6\text{H}{12}\text{O}_6 \)), which contains six carbon atoms.
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45 answers