HideShow resource information
  • Created by: tiacoles
  • Created on: 29-04-16 17:19

Darwin's Theory

Darwin's observations:

  • Organisms produce more offspring than survive
  • There's variations in characterisitics of members of the same species
  • Some of these characteristics can be passed on from generation to the next
  • Individuals that are best adapted to their environment are more likely to survive

Natural Selection

The theory of evolution by natural selection

  • Individuals within a population show variation in their phenotypes due to differences in their alleles
  • Predation, disease and competition create a struggle for survival
  • Individuals with better adaptations are more likely to survive, reproduce and pass on their alleles that cause the advantageous adaptation to their offspring
  • Over time, the number of individuals with advantageous adaptations


No comments have yet been made

Similar Biology resources:

See all Biology resources »See all DNA, genetics and evolution resources »