928043
Description
Mind Map by Steve Harton, updated more than 1 year ago
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Created by Steve Harton
over 10 years ago
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5.2 Natural Selection
- Nature of Science
- The theory of evolution
by natural selection
- TOK
- How much evidence is
required to support a theory?
- What sort of counter evidence
is required to refute it?
- How much evidence is
required to support a theory?
- Adaptations are characteristics
that make an individual suited to
its environment and way of life
- Individuals that are better adapted tend
to survive and produce more offspring
while the less well adapted tend to die or
produce fewer offspring
- Species tend to produce more
offspring than the
environment can support
- Individuals that reproduce pass on
characteristics to their offspring
- 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
- 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
- Individuals that reproduce pass on
characteristics to their offspring
- Species tend to produce more
offspring than the
environment can support
- Individuals that are better adapted tend
to survive and produce more offspring
while the less well adapted tend to die or
produce fewer offspring
- Characteristics acquired
during the lifetime of an
individual are not heritable
- Examples
- Antibiotic resistance
- Beaks in the finches
on Daphne Major
- Antibiotic resistance
- TOK
- The theory of evolution
by natural selection
- Variation
- Natural selection can only occur
if there is variation among
members of the same species
- Sexual reproduction
- Mutations
- Meiosis
- Sexual reproduction
- Natural selection can only occur
if there is variation among
members of the same species
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