Dichotomous Keys

Multiple Choice

What is a dichotomous key used for in science?

• To organize biomes

• Classify organisms

• Identify bacteria only

• None of these

Multiple Choice

When using a dichotomous key to identify organisms, what do we look at?

• physical features
• weather patterns
• environment
• diet

Multiple Choice

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

Multiple Choice

The science of describing, classifying, and naming living things is called:

• Geology
• Biology
• Taxonomy
• Chemistry

Multiple Choice

An illustration and a dichotomous key are given. What is the correct classification for this organism?

• Class Insecta
• Order Amblygygi
• Order Araneae
• Order Scorpiones

Multiple Choice

The scientific name for an organism is made from the:

• class and family name
• genus and species name
• domain and kingdom name
• kingdom and phylum name

Multiple Choice

What is the name of bird W?

• Certhidea

• Geospiza

• Camarhynchus

• Platyspiza

Multiple Choice

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

Multiple Choice

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

Multiple Choice

Which of the following characteristics will most likely be helpful in identifying a butterfly using a dichotomous key?

• Migrates north every spring
• hangs on branches
• flutters wings fast on hot days
• Wings have long extensions

Multiple Choice

A dichotomous key for insects is given. To what order does an insect with two pairs of scaly wings belong?

• Coleoptera
• Heteroptera
• Diptera
• Lepidoptera

Multiple Choice

A dichotomous key for insects is given. To what order does an insect with two pairs of scaly wings belong?

• Coleoptera
• Heteroptera
• Diptera
• Lepidoptera

Multiple Choice

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?

• Whip Scorpion
• Wind Scorpion
• Daddy long legs
• Scorpion

Multiple Choice

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 -

• five pairs of walking legs on each side.
• an enlarged propodus on both front legs.
• a pair of eyes on stalks at the top of the body.
• two pairs or chelipeds for a total of four.

Multiple Choice

A table of arachnid and insect characteristics is shown. Which characteristic could be used to distinguish between
arachnids and insects?

• Jointed legs
• Body segments
• Presence of eyes
• Presence of antennae

Multiple Choice

What step do we always start with when using dichotomous keys?

• 1
• 2
• 3
• 4

Multiple Choice

Using this dichotomous key, identify the name of the circled Fish, J.

• peacock flounder
• band-tail puffer
• trumpet fish
• spotted goat fish

Multiple Choice

What is the name of bird Z?

• Certhidea

• Geospiza

• Camarhynchus

• Platyspiza

Multiple Choice

Using this dichotomous key, identity the name of the circled fish.

• band-tail puffer

• spotted goat fish

• peacock flounder

• trumpet fish

Multiple Choice

What is monster # 1 ?

• Alienus quadlegicus

• Alienus haircus

• Alienus Tritoothicus

• Alienus Blobicus

Multiple Choice

What is monster # 3 ?

• Alienus Fuzzicus

• Alienus Stripicus

• Alienus Tritoothicus

• Alienus Blobicus

Multiple Choice

What is monster # 4 ?

• Alienus Fuzzicus

• Alienus Stripicus

• Alienus Quadlegicus

• Alienus Blobicus

Multiple Choice

What is monster # 2 ?

• Alienus Fuzzicus

• Alienus Stripicus

• Alienus Tritoothicus

• Alienus Blobicus

Multiple Choice

What is monster # 5 ?

• Alienus Fuzzicus

• Alienus Tritoothicus

• Alienus Hairicus

• Alienus Blobicus

Multiple Choice

What is monster # 6 ?

• Alienus Stripicus

• Alienus Tritoothicus

• Alienus Hairicus

• Alienus Quadlegicus

Multiple Select

Which of the following best describes insect no#.8

• 3 pairs of legs, body has 3 parts

• 4 pairs of legs, body has 2 parts

• 5–8 pairs of legs, with other

  smaller limbs

• Many pairs of legs, long thin body

Multiple Choice

According to key above, which animal has wings covered by an exoskeleton and a round body?

• Ladybug

• Grasshopper

• Dragonfly

• Housefly

Multiple Choice

Which of the following is a centipede?

Multiple Choice

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?

• Whip Scorpion

• Wind Scorpion

• Daddy long legs

• Scorpion