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Cytochrome c is a protein found in the electron transport chain of all eukaryotes. The table below shows the relative differences in cytochrome c among several species.

| Species | # Different Amino Acids (compared to humans) | Percentage Difference |
|-------------------|----------------------------------------------|-----------------------|
| Human | - | - |
| Chimpanzee | 0 | 0% |
| Sheep | 10 | 10% |
| Garden snail | 29 | 28% |
| Baker's yeast | 44 | 42% |
| Cauliflower | 44 | 42% |

What conclusion can you draw from this data?
A. Rattlesnakes evolved from baker's yeast.
B. Baker's yeast and cauliflower are the same species.


Sagot :

To analyze the given data and draw a conclusion:

1. Examine the Relationship Variances:
- The table presents different species and the number of amino acid differences in their cytochrome c compared to humans, alongside the percentage difference.
- For example, humans to sheep have 10 different amino acids (10% difference), and humans to garden snail have 29 different amino acids (28% difference).

2. Interpret the Given Options:
- Option A: Rattlesnakes evolved from baker's yeast.
- The provided data does not include any details about rattlesnakes. Therefore, no conclusion can be made about rattlesnakes in relation to baker's yeast or any other species listed in the table.

- Option B: Baker's yeast and cauliflower are the same species.
- Baker's yeast and cauliflower both have 44 amino acid differences compared to humans, which translates to a 42% difference.
- While the similarities in the percentage difference may imply some degree of genetic similarity, it is not conclusive evidence to claim that two organisms are the same species.
- Species designation involves a multitude of factors beyond just one protein comparison, including reproductive isolation, genetic variations, and ecological roles.
- Thus, the data provided does not support concluding that baker's yeast and cauliflower are the same species based solely on cytochrome c differences.

3. Draw a Conclusion Based on the Data:
- Given the constraints and details in the data, neither option A nor option B can be conclusively supported.
- There isn't enough information in the table to determine the evolutionary history of rattlesnakes or to classify baker's yeast and cauliflower as the same species solely based on the cytochrome c protein.

Thus, based on the information provided, no valid conclusion can be drawn from the given options (A and B) based on the presented data.