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how would I contrast photosynthesis and respiration of a plant? -- Also, how do plants respirate over night when everything is sleeping?

2007-07-12 12:39:00 · 4 answers · asked by K C M J 3 in Science & Mathematics Biology

... summer school. I hate it. :(

2007-07-12 12:39:46 · update #1

... summer classes. not fun. :(

2007-07-12 12:40:15 · update #2

4 answers

Contrast means to tell how they are different. Compare means to tell how they are alike.

Contrasting:
Photosynthesis
1. Uses light energy to make the energy-storing molecule called glucose. Only happens in the light.
2. Needs carbon dioxide and water.
3. Produces glucose and oxygen.
4. Happens in the chloroplasts of the cells.

Respiration
1. Breaks molecules of glucose to release energy for the plant to use. Happens all the time because plant cells need energy all the time. (Some people think that it just happens at night, but if you think about it, that's not the only time the cells are needing energy to make proteins, transport materials, and so on.)
2. Needs glucose and oxygen to work.
3. Produces carbon dioxide and water.
4. Happens in the mitochondria of the cells.

The second part of your question ... There's no reason for plants to not carry on respiration during the night. Respiration in this case does not refer to breathing. It's the breaking down of glucose to get energy to use. We usually use the word respiration to talk about breathing in and breathing out - our lungs are part of our respiratory system. But "cellular respiration" is that glucose-breaking process. All cells in every kind of living thing carry on that kind of respiration. Even bacteria, molds, algae, paramecia, oak trees, and dogs.

2007-07-12 16:01:57 · answer #1 · answered by ecolink 7 · 0 0

I'm no expert on photosynthesis, but I can answer your second question.

First, sleeping animals still emit carbon dioxide. They just emit more when they're awake. Second, even if animals did not breathe when they were asleep, there is enough carbon dioxide generated in the daytime that plants would have plenty to use for respiration during the night. They would only run out if all animals stopped breathing for several months or years.

2007-07-12 12:43:52 · answer #2 · answered by lithiumdeuteride 7 · 0 0

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2016-11-09 04:00:48 · answer #3 · answered by Anonymous · 0 0

yea i agree

2007-07-12 12:46:07 · answer #4 · answered by Anonymous · 0 0

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