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Worksheets17.1 Using Keys_1
Total questions: 10
Worksheet time: 28mins
There are 2,700 different snake species.
Each species has a ........................... set of features.
unique
same
A key can be
set out as a series of branches,
set of questions.
both are true
both are false
The questions need to be about features that
don’t change
could be change
...........................use a series of questions to distinguish each species from all the rest.
branching
investigation
keys
What is a dichotomous key used for in science?
To organize biomes
Classify organisms
Identify bacteria only
None of these
When using a dichotomous key to identify organisms, what do we look at?
physical features
weather patterns
environment
diet
What is the purpose of a dichotomous key?
to find a common ancestor
to show the evolution of organisms
to show relationships between organisms
to identify organisms
An illustration and a dichotomous key are given. What is the correct classification for this organism?
Class Insecta
Order Amblygygi
Order Araneae
Order Scorpiones
What is the name of bird W?
Certhidea
Geospiza
Camarhynchus
Platyspiza
A dichotomous key for trees is provided.
Hikers found a tree that has large brown cones and single sharp needles.
What species of tree have the hikers found?
Juniper
Pine
Spruce
Fir
