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Natural Selection, image - Coggle Diagram
Natural Selection
Precondition #1
must be heritable variation
variation is essential
variation is heritable
Random - Darwin suspected
not purposeful
may be harmful or helpful
functional, physical, or behavioral
Precondition #2
organisms struggle to exist
Malthus's concept
more offspring are produced than the environment can support
not all offspring can survive
compete
Precondition #3
organisms differ in fitness
most advantageous environment reproduce more
individuals produce more offspring than individuals reproducing less
advantageous trait passed on
Results
organisms become adapted
adaptations - traits that help an organism be more suited to its environment
