WorksheetsDichotomous Keys
Total questions: 10
Worksheet time: 13mins
Name
Class
Date
1.
A dichotomous key for trees is provided. Hikers found a tree that has large brown cones and sharp single bound needles. What species of tree have the hikers found?
a)
Juniper
b)
Pine
c)
Spruce
d)
Fir
2.
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 low lying branches
c)
flutters wings faster than a dragonfly
d)
Wings have long extensions
3.
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
4.
A student discovers an arachnid with a unsegmented abdomen, long legs that are shorter than the body,. 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
5.
A labeled diagram of a fiddler crab is provided. Which of the following is an accurate observation of the structures of a fiddler crab? Fiddler crabs have -
a)
five pairs of walking legs on each side.
b)
an enlarged propodus on both front legs.
c)
a pair of eyes on stalks at the top of the body.
d)
two pairs or chelipeds for a total of four.
6.
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
7.
What step do we always start with when using dichotomous keys?
a)
1
b)
2
c)
3
d)
4
8.
When using a dichotomous key to identify organisms, what do we look at?
a)
phenotypes
b)
genotypes
c)
environment
d)
diet
9.
Take your time and read carefully! Timer is 3 minutes!
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A student discovers an arachnid with a segmented abdomen, long legs, and a tail with a stinger. The student uses the dichotomous key below to identify it. Which arachnid has the student found?
---------
A student discovers an arachnid with a segmented abdomen, long legs, and a tail with a stinger. The student uses the dichotomous key below to identify it. Which arachnid has the student found?
a)
Whip Scorpion
b)
Wind Scorpion
c)
Tick
d)
Scorpion
10.
Identify leaf A
a)
Elm
b)
Chestnut
c)
Walnut
d)
Magnolia
100 %
