- Wings of insects and birds have become flat, large and stream lined, due to common requirement of flight.
This is an example of
(1) Convergent evolution (2) Parallel evolution
(3) Divergent evolution (4) Co-evolutionWhat Is Convergent Evolution?
Convergent evolution occurs when species from different evolutionary lineages develop analogous structures—features that perform similar functions but do not arise from a common ancestor. These adaptations arise because different organisms face similar ecological challenges and selective pressures, leading to comparable solutions.
Wings of Insects and Birds: Analogous Structures
-
Insect wings are membranous extensions supported by veins, evolved from body wall structures.
-
Bird wings are modified forelimbs with bones, muscles, and feathers, derived from vertebrate limbs.
Despite these distinct origins, both have evolved to be flat, large, and streamlined to efficiently generate lift and enable flight.
Why Are These Wings an Example of Convergent Evolution?
-
They evolved independently in vastly different groups (arthropods vs. vertebrates).
-
Their similar shape and function result from adapting to the same challenge: powered flight.
-
They are analogous, not homologous, structures.
Other Examples of Convergent Evolution
-
Wings of bats and birds.
-
Streamlined bodies of dolphins (mammals) and sharks (fish).
-
Camera-like eyes in cephalopods and vertebrates.
Conclusion
The flat, large, and streamlined wings of insects and birds exemplify convergent evolution—independent evolution of similar traits driven by similar functional demands. This highlights how nature can arrive at similar solutions through different evolutionary paths.
Correct answer:
(1) Convergent evolution -
