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Q1 / 5
Dichotomous keys
Foundation
1 mark
A key has the question: 'Does the organism have a backbone?' How many groups does this divide animals into?
A
Two groups: vertebrates (backbone) and invertebrates (no backbone)
B
Five groups based on different types of backbone
C
Three groups: large backbone, small backbone, none
D
No groups — a backbone is universal
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Dichotomous keys — Biology (0610) | Smartzi