Evolution by natural selection

Evolution by natural selection

1. Overproduction

   • Capacity to produce more offsprings than environment can sustain

2. Stability of population sizes

   • Remain stable regardless of individuals' capability to overproduce

3. Limited resources

   • environment=resources limited
     • Competition between individuals for resources, successful indiv. live

4. Individual variability

   • No two individuals are identical

5. Heritability of individual variability

   • Parents pass on particular traits to their offsprings, they pass on their individual variability

6. Important points about evolutions

   • Individuals do not evolve: population does
   • Only heritable traits can be passed on
   • Traits success depends on environment