To determine the conclusion from the given data regarding cytochrome c sequences among several species, we can follow these steps:
1. Understand the Table:
- The table provides information on the number of different amino acids in the cytochrome c protein when compared to humans, along with the corresponding percentage differences for each species.
2. Key Data Points:
- Chimpanzees have 0 different amino acids and a 0% difference compared to humans.
- Sheep have 10 different amino acids and a 10% difference.
- Rattlesnakes have 14 different amino acids and a 13% difference.
- Carp have 18 different amino acids and a 17% difference.
- Garden snails have 29 different amino acids and a 28% difference.
3. Analyzing Close Relations:
- The degree of similarity in the cytochrome c protein sequence can indicate how closely related different species are to humans.
- The fewer the number of different amino acids and the lower the percentage difference, the more closely related a species is to humans.
4. Comparing Species:
- Chimpanzees have 0 different amino acids from humans, implying they are the most closely related.
- Carp have 18 different amino acids from humans.
- This clear difference indicates that humans are more closely related to chimpanzees than carp.
5. Drawing Conclusion:
- Given the data, humans are most closely related to chimpanzees (0 amino acid difference) when compared to carp (18 amino acid difference).
Thus, the conclusion we can draw from the data in the table is:
A. Humans are more closely related to chimpanzees than carp.
