topic 5.2 natural selection
Nature of science:
- Use theories to explain natural phenomena—the theory of evolution by natural selection can explain the development of antibiotic resistance in bacteria. (2.1)
- The diversity of life has evolved and continues to evolve by natural selection.
U 5.2.1 Natural selection can only occur if there is variation among members of the same species.
U 5.2.2 Mutation, meiosis and sexual reproduction cause variation between individuals in a species.
U 5.2.3 Adaptations are characteristics that make an individual suited to its environment and way of life.
U 5.2.4 Species tend to produce more offspring than the environment can support.
U 5.2.5 Individuals that are better adapted tend to survive and produce more offspring while the less well adapted tend to die or produce fewer offspring.
U 5.2.6 Individuals that reproduce pass on characteristics to their offspring.
U 5.2.7 Natural selection increases the frequency of characteristics that make individuals better adapted and decreases the frequency of other characteristics leading to changes within the species.
A 5.2.1 Changes in beaks of finches on Daphne Major.
A 5.2.2 Evolution of antibiotic resistance in bacteria.
survival of fittest
In the News:
In the News:
- Natural Selection is a theory. How much evidence is required to support a theory and what sort of counter evidence is required to refute it?
Click here for a video clip on Theory.