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Study Guide-Classification Keys


Online Study Guide
Instructions
1) You do not need to type in your name in the space in the top-left area above. The results of this study guide will not be sent to your teacher.
2) Carefully read each question and all the answer choices.
3) Select the correct letter from the drop-down feature to the left of each question.
4) When you are finished, click the “Check Your Work” button in the bottom-left corner of the page.
5) The software will grade your work, and then it will show you the results. Note that the correct answer will be displayed beneath the questions.
6) Keep doing the study guide over until you earn a 100 on it.
 

 1. 

An organism like the one shown in the picture below is caught in a net.
mc001-1.jpg
mc001-2.jpg
Using the classification key above, identify the organism’s class.
a.
Class Insecta
b.
Class Chondrichthyes
c.
Class Mammalia
 

 2. 

A fish and a dichotomous key are shown below
mc002-1.jpg
According to the dichotomous key, which fish is pictured?
a.
smallmouth bass
b.
lantern fish
c.
yellow perch
 

 3. 

Dichotomous Key of Chlorophyll-Containing Organisms.

#1a. This organism is not a plant.(algae)
 b. This organism is a plant.(go to step 2)
 
#2a. This plant does not have vascular tissue.(go to step 3)
 b. This plant has vascular tissue.(go to step 4)
 
#3a. The spore-producing capsule opens by splitting lengthwise.(liverworts)
 b. The spore-producing capsule releases spores through the capsule tip.(mosses)
 
#4a. This plant does not produce seeds.(go to step 5)
 b. This plant produces seeds.(go to step 7)
 
#5a. This plant has hollow stems containing silica.(horsetails)
 b. This plant does not have hollow stems containing silica. (go to step 6)
#6a. This plant produces on the underside of its fronds.(ferns)
 b. This plant produces spores in cone-like tips(club mosses)
#7a. This plant does not produce flowers.(gymnosperms)
 b. This plant produces flowers.(angiosperms)

Use this dichotomous key to determine which of the following choices defines a club moss.
a.
Club mosses are vascular plants that don’t form seeds. They produce spores in cone-like tips.
b.
Club mosses are plants that produce spores inside of their flowers.
c.
Club mosses are plants that reproduce using seeds that grow in cone-like structures.
 

 4. 

An organism and a classification key are shown below.
mc004-1.jpg
mc004-2.jpg
Based on the key above, what organism is shown?
a.
earthworm
b.
centipede 
c.
water penny
 

 5. 

Trait
Flowering Plants
Ferns
Conifers
Have true leaves, stems, and roots
Yes
Yes
Yes
Are often found in dry places
Yes
No
Yes
Have sharp, needle-like leaves
Some species
No
Yes
Seeds develop in a cone
No
No
Yes
Seeds are enclosed in a fruit
Yes
No
No

Using the characteristic chart provided above, which of the following characteristics would absolutely identify a flowering plant and eliminate the other species?
a.
The seeds are enclosed in a fruit.
b.
Its seeds are often developed in a cone.
c.
It has true leaves, stems, and roots.
 

 6. 
NOTE: This is only for Mr. Elliott’s students. If you are not one of Mr. Elliott’s students, then you are doing the wrong assessment. Please go back to the website and click on the link for other teachers. Thanks!

A classification key for an organism is shown below.
mc006-1.jpg
To what class does the organism belong?
a.
Cestoda
b.
Trematoda
c.
Gastropoda
 

 7. 

The table provides information about different worms.
mc007-1.jpg
Which is an example of a non-segmented worm with no body cavity?
a.
leeches
b.
Earthworms
c.
tapeworms
 

 8. 

A picture of a fungus and a classification key are shown below.
mc008-1.jpg

Fungus Classification Key
1a. Grows shelf-like on wood.........................go to 2
  b. Grows on a stem out of the ground............go to 3
2a. Pattern of semi-circular stripes..................turkey tail
  b. No pattern of stripes or dots....................beefsteak
3a. Has a round cap......................................fly agraric
  b. Has an irregular shaped cap....................go to 4
4a. Cap is funnel-shaped...............................golden chanterelle
  b.Cap is brain shaped.................................common morel
Based on the classification key above, which fungus is shown?
a.
common morel
b.
turkey tail
c.
golden chanterelle
 

 9. 
Students on a field trip visited a farm. The teacher gave the students a classification key to help them identify some of the farm animals.
mc009-1.jpg
The students observed a furry animal with four legs. The animal had hoofed feet and no horns.
According to the key, which animal did the students find?
a.
Bos taurus
b.
Anas platyrhynchos
c.
Equus ferus caballus
 

 10. 

Trait
Algae, green
Angiosperm
Fern
Gymnosperm
Liverwort
Has many cells
No
Yes
Yes
Yes
Yes
Lives entirely in water
Most Species
No
No
No
No
Lives on land
A few species
Yes
Yes
Yes
Yes
Has true roots, stems, and leaves
No
Yes
Yes
Yes
No
Produces seeds in cones
No
No
No
Yes
No
Produces seeds in fruit
No
Yes
No
No
No
Produces spores
No
No
Yes
No
Yes
Plants are only male or only female
No
No
No
Some species
No

Use the chart provided above:
A certain species does not produce spores, lives on land, and produces seeds in fruit.
Which of the following traits must also be true about this species?
a.
It has true roots, stems, and leaves
b.
It produces seeds in cones
c.
It lives entirely in water
 



 
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