2. According to the phylogenetic tree which two organisms share the most recent

Question

2. According to the phylogenetic tree which two organisms share the most recent common ancestor? 3. By examining evidence from fossils, and molecular and anatomical comparisons, evolutionary biologists have inferred that lemurs and humans share a common ancestor at about 43 million years ago, and that humans and chimpanzees share a common ancestor at about 6 m.y.a. How many years of evolution occurred between these two splits in common ancestral lineages? a. Based on the calculation above, what appears to be the rate of mutation for beta hemoglobin per one million years? b. Do chimpanzees and squirrel monkeys share a common ancestor 4 million years ago? 4. Why or why not? (Think about the mutation rate you calculated.)

Explanation / Answer

Ans 2. According to the phylogenetic tree the two organisms which share the most recent common ancestor are the nucleariids and the slime molds.

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