ANATOMY

Detailed explanation-1: -evolution can never take place with common ancestors. the more two organisms have in common, the more recent is their common ancestor during their evolution.

Detailed explanation-2: -Common ancestry allows Darwin to infer what happened in the lineage leading to modern mammals. The fact that present day birds and reptiles have sutures but no live birth is evidence that sutures were present in the lineage leading to modern mammals before live birth evolved.

Detailed explanation-3: -Ancestral organism shared by two or more descendent lineages-in other words, an ancestor that they have in common. For example, the common ancestors of two biological siblings include their parents and grandparents; the common ancestors of a coyote and a wolf include the first canine and the first mammal.

Detailed explanation-4: -That’s because closely related species most likely diverged from one another fairly recently in the evolutionary span. Thus, they haven’t had as much time to accumulate random mutations in their genetic codes.

Detailed explanation-5: -Answer and Explanation: The correct answer is (D) Primates and Rodents/Rabbits. As you can see in the cladogram, primates and rodents/rabbits are both removed from their evolutionary common ancestor by a single branch point.