Summary
OCR A-Level Biology Evolution Summary
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A HandWritten summary which contains all the necessary A* Content for Evolution at OCR A-Level Biology.
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Theory of evolution Well adapted animals reproduce better·
Charles Darwin
:
-
Evidence for evolution
·
:
Paleontology Study of fossils
·
:
Comparative anatomy study of similarities and differences in anatomy
·
:
Comparative biochemistry Similarities and differences in the chemical makeup
:
of organisms
Homologous structures :
Structures that appear different in different
organisms but have the
same structure
underlying
Evolutionary embryology Embryos of different animous look and develop similarly
:
Types of Variation :
·
interspecific
:
between species
intraspecific Within a species
· :
Genetic Causes of Variation :
Alleles mutations , meiosis ,
,
reproduction chance ,
Adaptations :
Characteristics that increase an
organisms chance of survival and reproduction
in environment
a
given
Anatomical :
physical (internal and externall features .
↳ Body covering ,
teeth
camouflage mimicry sunhen stomata leaf hairs
,
, , ,
Behavioural How an both learned and inverted
·
organism acts
-
:
↳ Survival
behaviours hibernation courtship
, ,
,
migration
Innate Inherited
·
through genes building webs
:
ie
Learned
Through experience of tools
·
i e the use
.
or observation
:
.
Physiological Processes inside
·
that take
place organism
:
an
↳ Poison
production ,
antibiotic production , water
holding
Analogous Structures perform the same function from different genetic origins
:
convergent evolution Unrelated species begin to share similar fraits
:
↳ Response to selection pressures
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