Explain, which organism provides most of the Earths oxygen? (One

Part 2.doc

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Parts  1 and 2 have the same questions. However, you must answer with references and different writing, always addressing them objectively, as if you were different students. Similar responses in wording or references will not be accepted.

Part 1: Biology Lab

1. Explain, which organism provides most of the Earth’s oxygen? (One paragraph)

2. The endosymbiosis theory states that mitochondria and chloroplasts arose from ancient bacteria that were ingested by ancestral eukaryotic cells.  (One paragraph)

a. Describe two pieces of evidence that are consistent with this theory. 

3. According to part 1 file (One paragraph)

a. Describe and identify which molecules are inputs of photosynthesis and

b. Which molecules are outputs of photosynthesis.

4. Testing the effect of altering at least two of these variables on the rate of photosynthesis (Check part 1 file) (One paragraph)

a. Design one hypothesis using the initial carbon dioxide variable 

b. Design one hypothesis using the waterflow-through-leaf variable 

5. Since we are using two different proxies to measure the rate of photosynthesis, the dependent variable will be the same for both experiments. (One paragraph)

a. Identify the independent and dependent variables for hypotheses "a"

b.  Identify the independent and dependent variables for hypotheses "b"

6. Suppose that the parameters you selected should be tested at different levels (low, medium, and high intensities) (One paragraph)

a. Discuss the experimental design using initial carbon dioxide variable at low, medium, and high intensities

b. Discuss the experimental design using the waterflow-through-leaf variable at low, medium, and high intensities

7. How would you know whether the change in the independent variable affects the dependent variable if you do not alter your independent variable? Explain (One paragraph)

8.What trends do you see in your data?(One paragraph)

9.Do your results for each experiment support your hypotheses? Explain.(One paragraph)

10. For each set of experiments, are the results you obtained consistent with published data? Explain.(One paragraph)

11.For the following statement, decide whether it is true or false and provide a justification for your answer. Most of the mass of a tree comes from the air.(One paragraph)

12. Do plants contain mitochondria in addition to chloroplasts? (One paragraph)

a. In light of your answer, do plants carry out cellular respiration?

Part 1: Biology Lab

1. Explain, which organism provides most of the Earth’s oxygen?(One paragraph)

2. The endosymbiosis theory states that mitochondria and chloroplasts arose from ancient bacteria that were ingested by ancestral eukaryotic cells. (One paragraph)

a. Describe two pieces of evidence that are consistent with this theory. 

3. According to part 2 file(One paragraph)

a. Describe and identify which molecules are inputs of photosynthesis and

b. Which molecules are outputs of photosynthesis.

4. Testing the effect of altering at least two of these variables on the rate of photosynthesis (Check part 2 file)(One paragraph)

a. Design one hypothesis using the initial carbon dioxide variable

b. Design one hypothesis using the light intensity variable 

5. Since we are using two different proxies to measure the rate of photosynthesis, the dependent variable will be the same for both experiments.(One paragraph)

a. Identify the independent and dependent variables for hypotheses "a"

b.  Identify the independent and dependent variables for hypotheses "b"

6. Suppose that the parameters you selected should be tested at different levels (low, medium, and high intensities)(One paragraph)

a. Discuss the experimental design using initial carbon dioxide variable at low, medium, and high intensities

b. Discuss the experimental design using the light intensity variable at low, medium, and high intensities

7. How would you know whether the change in the independent variable affects the dependent variable if you do not alter your independent variable? Explain (One paragraph)

8.What trends do you see in your data?(One paragraph)

9.Do your results for each experiment support your hypotheses? Explain.(One paragraph)

10. For each set of experiments, are the results you obtained consistent with published data? Explain.(One paragraph)

11.For the following statement, decide whether it is true or false and provide a justification for your answer. Most of the mass of a tree comes from the air.(One paragraph)

12. Do plants contain mitochondria in addition to chloroplasts? (One paragraph)

a. In light of your answer, do plants carry out cellular respiration?