178371
Description
Mind Map by tomking304, updated more than 1 year ago
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Created by tomking304
about 11 years ago
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DARWIN'S THEORY
OF EVOLUTION
- 5 THEORIES
- NATURAL SELECTION
- favourable variations would
be preserved & unfavourable
ones destroyed
- variational theory
of change
- favourable variations would
be preserved & unfavourable
ones destroyed
- populational
change
- common descent
- gradualism
- characteristics of lineages of
organisms change over time
- NATURAL SELECTION
- main 2 components
- pattern
- divergent descent with
modifications from
common ancestors
- explains diversity of life
- explains diversity of life
- divergent descent with
modifications from
common ancestors
- process
- natural selection - preferential
survival & reproductive success
- natural selection - preferential
survival & reproductive success
- pattern
- MICROEVOLUTION
- mutation, recombination, natural
selection & other processes
operating with species
- evolutionary patterns & processes evident
within species as well as those leading to
evolution of new species
- mutation, recombination, natural
selection & other processes
operating with species
- MACROEVOLUTION
- origin of new species & major
long-term features of evolution
- evolutionary patterns & process
evident above level of species
- origin of new species & major
long-term features of evolution
- GENETIC DRIFT
- random changes in frequencies
of different alleles in population
- arise solely from chance sampling
effects in their transmission from
generation to generation, rather than
from changes due to natural selection
- arise solely from chance sampling
effects in their transmission from
generation to generation, rather than
from changes due to natural selection
- random changes in frequencies
of different alleles in population
- EVIDENCE
FOR
EVOLUTION
- hierarchical
organisation
of life
- homology
- embryological
similarities
- vestigial
characters
- convergence
- sub-optimal
design
- geographic
distributions
- intermediate
forms
- hierarchical
organisation
of life
- COMPETITION
- Pressure of competition favours
use of different foods or habitats
by different species
- interaction within or between species resulting
in one group consuming resources that could
have been exploited by the other group, with
negative consequences for fitness
- Pressure of competition favours
use of different foods or habitats
by different species
- PATTERNS OF
EVOLUTION
- common themes frequently inferred as
associated with evolution of organisms,
i.e. divergence, convergence, allometry,
heterochrony, etc
- common themes frequently inferred as
associated with evolution of organisms,
i.e. divergence, convergence, allometry,
heterochrony, etc
- STASIS
- little or no evolutionary
change within a lineage
- major component of
punctuated equilibrium
model
- major component of
punctuated equilibrium
model
- little or no evolutionary
change within a lineage
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