Question

Both human beings and chimpanzee have a common ancestor justify this statement by giving reason behind the conclusion

Answer 1

Humans and chimpanzees having a common ancestor is a wrong idea.

Chimpanzees belong to Hominidae and humans belong to Homo sapiens group.

However, chimpanzees have certain similarities with the human body due to genetic regulations.

This leads to the very common misconception that the two species belong in the same category.

Answer 2

• If widely separated groups of organisms are originated from a common ancestry, they are expected to have certain basic features in common. The degree of resemblance between two organisms should indicate how closely related they are in evolution:  
• Groups with little in common are assumed to have diverged from a common ancestor much earlier in geological history than groups with a lot in common;
• In deciding how closely related two animals are, a comparative anatomist looks for structures that are fundamentally similar, even though they may serve different functions in the adult. Such structures are described as homologous and suggest a common origin.
• In cases where the similar structures serve different functions in adults, it may be necessary to trace their origin and embryonic development. A similar developmental origin suggests they are the same structure, and thus likely derived from a common ancestor.
• When a group of organisms share a homologous structure that is specialized to perform a variety of functions to adapt different environmental conditions and modes of life, it is called adaptive radiation. The gradual spreading of organisms with adaptive radiation is known as divergent evolution.