Dichotomous Keys - Assessment

1.

Multiple Choice

2 mins

1 pt

An illustration of two fish is provided. Which paired statements could be used to distinguish the fish using a dichotomous key?

Eyes on side of head
Eyes on top of head

One set of dorsal fins
Two sets of dorsal fins

Mouth at front of head
Mouth on underside of head

Rounded caudal fin
Forked caudal fin

2.

Multiple Choice

2 mins

1 pt

An illustration of four leaves and a dichotomous key are provided. Use the dichotomous key to identify which of the leaves is from a magnolia tree.

Leaf 1

Leaf 2

Leaf 3

Leaf 4

3.

Multiple Choice

2 mins

1 pt

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

4.

Multiple Choice

2 mins

1 pt

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?

It was discovered in the summertime.

It is wet from a recent rain storm.

Its leaves curl up on the edges.

It is eaten by native jungle ants.

5.

Multiple Choice

2 mins

1 pt

An illustration of three beetles is given. A student examines three different species of beetles that are related. What structure is identical in all three beetle species?

Antennae length

Placement of eyes

Markings on abdomen

Width of thorax

6.

Multiple Choice

2 mins

1 pt

A dichotomous key is provided. A fish is caught that has eyes on the side of its head and a wide body covered in spots. What kind of fish is this?

Cornetfish

Flounder

Puffer fish

Snapper

7.

Multiple Choice

2 mins

1 pt

An illustration of an organism and a dichotomous key are given. What is the organism?

Arachnid

Dragonfly

Fruit fly

Mayfly

8.

Multiple Choice

2 mins

1 pt

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

9.

Multiple Choice

2 mins

1 pt

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 to rest.

Flutters wings faster on hot days.

Hind wings have tail extensions.

10.

Multiple Choice

2 mins

1 pt

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

Coleoptera

Diptera

Heteroptera

Lepidoptera

11.

Multiple Choice

2 mins

1 pt

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?

Daddy Long Legs

Scorpion

Wind scorpion

Whip scorpion

12.

Multiple Choice

2 mins

1 pt

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

Class Insecta

Order Amblygygi

Order Araneae

Order Scorpiones

13.

Multiple Choice

2 mins

1 pt

A labeled diagram of a fiddler crab is provided. Which of the following is an accurate observation of the structures that 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.

Explore this activity with a free account