WorksheetsDichotomy Keys
Total questions: 15
Worksheet time: 31mins
Name
Class
Date
1.
When using a dichotomous key to identify organisms, what do we look at?
a)
physical features
b)
weather patterns
c)
environment
d)
diet
2.
What step do we always start with when using dichotomous keys?
a)
1
b)
2
c)
3
d)
4
3.
What is the purpose of a dichotomous key?
a)
to find a common ancestor
b)
to show the evolution of organisms
c)
to show relationships between organisms
d)
to identify organisms
4.
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?
a)
Juniper
b)
Pine
c)
Spruce
d)
Fir
5.
What step do we always start with when using dichotomous keys?
a)
1
b)
2
c)
3
d)
4
6.
A student discovers an arachnid with a segmented abdomen, long legs, and a tail with no stinger. The student uses the dichotomous key below to identify it. Which arachnid has the student found?
a)
Whip Scorpion
b)
Wind Scorpion
c)
Daddy long legs
d)
Scorpion
7.
A botanist discovers a new plant in the jungle. Which of the
following observations of the plant’s characteristics would be useful in determining its identity with a dichotomous key?
following observations of the plant’s characteristics would be useful in determining its identity with a dichotomous key?
a)
It was discovered in the summertime
b)
It is wet from a recent rain storm.
c)
Its leaves curl up on the edges.
d)
It is eaten by native jungle ants.
8.
Which leaf is shown in the drawing?
a)
Magnolia
b)
Redbud
c)
Sweetgum
d)
None of the above
9.
What is monster # 1 ?
a)
Alienus quadlegicus
b)
Alienus haircus
c)
Alienus Tritoothicus
d)
Alienus Blobicus
10.
What is monster # 4 ?
a)
Alienus Fuzzicus
b)
Alienus Stripicus
c)
Alienus Quadlegicus
d)
Alienus Blobicus
11.
What is monster # 2 ?
a)
Alienus Fuzzicus
b)
Alienus Stripicus
c)
Alienus Tritoothicus
d)
Alienus Blobicus
12.
What is monster # 5 ?
a)
Alienus Fuzzicus
b)
Alienus Tritoothicus
c)
Alienus Hairicus
d)
Alienus Blobicus
13.
What is monster # 6 ?
a)
Alienus Stripicus
b)
Alienus Tritoothicus
c)
Alienus Hairicus
d)
Alienus Quadlegicus
14.
What is the name of bird W?
a)
Certhidea
b)
Geospiza
c)
Camarhynchus
d)
Platyspiza
15.
What is the name of bird Z?
a)
Certhidea
b)
Geospiza
c)
Camarhynchus
d)
Platyspiza
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