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Biology
classification
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Cards (13)
Classification
The organisation of
organisms
into
groups
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Taxonomy
The
classification
of
organisms
into
taxa
:
kingdom
,
phylum
,
class
,
order
,
family
,
genus
,
species
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Five kingdoms
Animals
Plants
Fungi
Protists
Prokaryotes
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As you move down the hierarchy of taxa
The
number
of
organisms
in each
taxon
group
decreases
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Traditionally,
organisms
were
grouped
based on
similarities
and
differences
in their
anatomy
and
behaviour
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Organisms
that are
not
closely
related
may look
alike
and
behave
similarly
if they
live
in the
same environment
e.g.
sharks
and
dolphins
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Some
closely
related
species may
look
very
different
if they
live
in
different
habitats
e.g.
queen
ants
,
worker
ants
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Advancements in science that have led to reconsidering the five kingdoms classification system
Microscopes
Biochemistry
DNA
and
RNA
analysis
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Three domains system of classification
Organisms
are
initially
divided
into
three
groups
:
Archaea
,
Bacteria
,
Eukarya.
Then
kingdom
,
phylum
,
class
,
order
,
family
,
genus
,
species.
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Eukaryotic
organisms
belong
to the
domain
Eukarya
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Prokaryotic
organisms
belong to the
domains
Archaea
and
Bacteria
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Domain
Bacteria
Consists
of
true
bacteria
e.g.
E.coli
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Domain Archaea
Consists
of
primitive
microorganisms
, contains
extremophiles
-
adapted
to
live
in
extreme
conditions
e.g.
hot
springs
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