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A level Bio
UNIT 4
CLASSIFICATION
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How do scientists classify organisms into groups?
taxonomy
- large groups are divided into
smaller
groups that reflect
evolutionary history
and
anatomical features
of organisms
PHYLOGENY
= Tells us who is related to who and how closely related they are. Grouped according to
evolutionary history
species= group of
similar organisms
that reproduce to give
fertile offspring
What is the naming system for organisms
Binomial
first part=
genus
name w/
capital
letter
second part=
species
name w/
lowercase
letter
CLASSIFICATION HEIRARCHAL SYSTEM
D =
domain
K =
kingdom
P =
phylum
C =
class
O =
order
F =
family
G =
genus
S =
species
Courtship behaviour
is
species specific-
only members of the same species will do and respond to it
How is courtship behaviour beneficial?
Allows members of the same
species
to
recognise
each other
Make
reproduction
more successful - mating w/ wrong species will not produce
fertile
offspring
Prevents
interbreeding
Stimulates
mating
attraction of
opposite sex