A student BLASTs a human cytochrome c protein against five other species. The table shows percent identity of each match.
Which inference is best supported?
- Acheck_circle
Humans share a more recent common ancestor with chimpanzees than with yeast.
- B
Yeast and humans evolved cytochrome c independently.
- C
Tuna are more closely related to chickens than to mice.
- D
Mouse cytochrome c is functionally identical to human cytochrome c.
Explanation
Greater sequence similarity correlates with more recent common ancestry. Chimpanzee at 100 percent indicates the closest relationship; yeast at 63 percent is the most distant.