Answer :
A major unifying concept in biology is evolution. "Nothing in biology makes sense except in the light of evolution," Theodosius Dobzhansky once said.
Numerous branches of biology provide proof of evolution:
Anatomy: Because a physical characteristic was present in the following common ancestor, species may have similar physical characteristics (homologous structures).
the study of molecules. The genetic code and DNA show how life has a common ancestor. Comparing species' DNA can reveal how closely related they are.
Biogeography : Evolution and geological change are reflected in the global distribution of creatures as well as the distinctive characteristics of island species.
Fossils : The existence of species that are related to modern species but are now extinct is documented through fossils.
Direct perception: in creatures with brief life cycles, small-scale evolution can be seen directly (e.g., pesticide-resistant insects).
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