The Earth consists of a variety of different organisms. Despite their diversity, however, some similarities on the structural and metabolic levels may be seen. These similarities can be attributed to

Question

A.
the ability of organisms to readily adapt to sudden environmental changes.
B.
similarities among organisms in their proteins and nucleic acids.
C.
similarities in organisms' habitats and niches.
D.
the ability of all organisms to interbreed and produce new species.

Answer 1

B. similarities among organisms in their proteins and nucleic acids.