A3.2.1 (HL)—Need for classification question 1
Outline the principles used by scientists to classify organisms.
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Outline the principles used by scientists to classify organisms.
a
use of the binomial system
Names of the seven taxa not required.
OWTTE
Marking guidance:
Allow example e.g. fossil record comparison
4 max
b
agreed/developed by scientists / OWTTE
c
hierarchy of taxa used
d
three domains used/three domain names
e
genome/DNA sequence similarities
OR amino acid sequence of specific proteins
f
species from a common ancestor are grouped together
OR
included in the same clade/branch in cladogram
9
use evidence of evolutionary origin
h
shared characteristics within a group
OR
similar embryonic development