Question

1. from where does the cell get the energy to do this? - hydrogen
2. the stripped molecules get the energy to do this? - sunlight

• to practice nadph. where does it go after this?
• click on

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1. what gas enters the leaf? - carbon dioxide
2. this gas enters through \holes\ in the leaf. what are they called? - stomata

• click on

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1. what molecule is formed once again?

• click on

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1. another molecule is formed (\and boy is it sweet\). draw this molecule below as shown.
2. what is the name of this molecule? - glucose

• click on \three puzzlers\ at the top of the box.

answer each of the following questions, and explain in your own words.

1. can a tree produce enough oxygen to keep a person alive? explain.
2. can a plant stay alive without light? explain.
3. can a plant survive without oxygen? explain.

Explanation:

1. Water molecules are split during the light - dependent reactions of photosynthesis in the thylakoid membranes of chloroplasts to release oxygen and provide electrons and hydrogen ions.
2. The energy for splitting water comes from light energy absorbed by chlorophyll. NADPH (nicotinamide adenine dinucleotide phosphate hydrogen) is formed and it goes to the Calvin cycle to provide reducing power for the synthesis of glucose.
3. (No specific question content for this step in the reference answer)
4. Carbon dioxide enters the leaf through stomata.
5. During photosynthesis, after carbon dioxide enters and goes through the Calvin cycle, glucose is formed again.
6. (No specific drawing shown in reference answer)
7. Glucose is a simple sugar molecule.
8. A single tree can produce a significant amount of oxygen through photosynthesis, but whether it is enough to keep a person alive depends on many factors such as the tree's size, species, and environmental conditions. In general, a large tree can produce enough oxygen for a person's daily needs as it continuously photosynthesizes.
9. Plants cannot stay alive without light for long. Light is essential for photosynthesis, which is the process by which plants convert carbon dioxide and water into glucose and oxygen, providing energy and food for the plant.
10. Plants cannot survive without oxygen. They need oxygen for cellular respiration, which is the process of breaking down glucose to release energy for their metabolic activities.

Answer:

1. Thylakoid membranes of chloroplasts.
2. Light energy; goes to the Calvin cycle.
3. No specific answer provided in reference.
4. Carbon dioxide; stomata.
5. Glucose.
6. No drawing provided in reference.
7. Glucose.
8. A single tree can potentially produce enough oxygen for a person depending on various factors.
9. No, because light is needed for photosynthesis which provides energy and food.
10. No, because they need oxygen for cellular respiration to release energy from glucose.