มองหาคำศัพท์ใดก็ได้ เช่น sex:
 
1.
modification of an organism or its parts that makes it more fit for existence under the conditions of its environment
adaptation:
Some examples are: hollow bones and feathers of birds that enable them to fly, or the cryptic coloration that allows many organisms to hide from their predators.

โดย twiztiddezirez 14 กันยายน 2005