• co-evolution is the process in which two species evolve in response to changes in each other over a period of time.
  • change in the genetic composition of one species in response to genetic change of another is called reciprocal evolutionary change.

Example: flowering plants can reproduce only if the shape, color, and odor attract a specific pollinator.

Borrowed from Benjamin Cummings Textbook

Borrowed from Corante

The flower and the bug have co-evolved so their stem/antennae have similar structure

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