WorksheetsDichotomous Keys
Total questions: 17
Worksheet time: 14mins
Name
Class
Date
1.
Tool used by a taxonomist to identify an unknown organism is a:
a)
dichotomous key
b)
binomial nmenclature
c)
scientific name
d)
binomial key
2.
An illustration and a dichotomous key are given. What is the correct classification for this organism?
a)
Class Insecta
b)
Order Amblygygi
c)
Order Araneae
d)
Order Scorpiones
3.
A table of arachnid and insect characteristics is shown. Which characteristic could be used to distinguish between
arachnids and insects?
arachnids and insects?
a)
Jointed legs
b)
Body segments
c)
Presence of eyes
d)
Presence of antennae
4.
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.
5.
When using a dichotomous key to identify organisms, what do we look at?
a)
physical features
b)
weather patterns
c)
environment
d)
diet
6.
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
7.
What step do we always start with when using dichotomous keys?
a)
1
b)
2
c)
3
d)
4
8.
What is the name of bird W?
a)
Certhidea
b)
Geospiza
c)
Camarhynchus
d)
Platyspiza
9.
What is the name of bird Z?
a)
Certhidea
b)
Geospiza
c)
Camarhynchus
d)
Platyspiza
10.
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
11.
A dichotomous key for insects is given. To what order does an insect with two pairs of scaly wings belong?
a)
Coleoptera
b)
Heteroptera
c)
Diptera
d)
Lepidoptera
12.
Which of the following characteristics will most likely be helpful in identifying a butterfly using a dichotomous key?
a)
Migrates north every spring
b)
hangs on branches
c)
flutters wings fast on hot days
d)
Wings have long extensions
13.
Leaf S (3RD LEAF)
a)
Eastern white pine
b)
balsam poplar
c)
sweet gum
d)
ginko
14.
What type of characteristics are used to make a dichotomous key?
a)
Characteristics that make an organism different from any other organism. (type of beaks, claws, root systems)
b)
Characteristics like age of an organism
c)
Where the organism lives
d)
How many organisms live in the environment
15.
Which characteristics are used to identify the American Robin?
a)
Head color, Beak shape, and Beak Color
b)
Head color and Beak Color
c)
Beak Shape and Beak Color
d)
Beak Color
16.
A dichotomous key for trees is provided. A park ranger found a tree that has large cones and needles in groups. What species of tree has the park ranger found?
a)
Juniper
b)
Pine
c)
Spruce
d)
Fir
17.
Leaf Q (1ST LEAF)
a)
Eastern white pine
b)
balsam poplar
c)
sweet gum
d)
ginko
100 %
