Question

the field of comparative genomics studies the relationship of genetic structures across different biological species compared to genetic analysis in several species of mammals have shown that scientific genetic similarities can be found across physically diverse mammal species this indicates thata. mammalian species cannot undergo evolution changesb. mammalian species do not share any common ancestorsc. mammalian species all share a common ancestor within the last 100 yearsD. mammalian slecies envolve from a distant common ancestor ​

Answer 1

Comparative genomics reveals genetic similarities across diverse mammalian species, indicating they evolved from a distant common ancestor. This is demonstrated through homologous structures and high genetic sequence similarity.

Step-by-step explanation:

The field of comparative genomics studies the relationships of genetic structures across different biological species. In this field, scientists analyze genetic sequences to make evolutionary connections, looking at both morphological evidence and genetic similarities. When several species of mammals are compared genetically, the discovery of significant genetic similarities across these diverse species supports the hypothesis that mammalian species evolved from a distant common ancestor. This ancestral relationship can be seen through the presence of homologous structures - those that are similar both in form and genetic makeup due to evolutionary origins.

The correct answer to the student's question is D: mammalian species evolve from a distant common ancestor. The existence of shared genetic sequences amongst mammals, such as the 98% genetic similarity between humans and chimpanzees, is an important indicator of common descent. These findings are essential in constructing the 'tree of life,' which illustrates the evolutionary relationships between various species.