1 An illustration of two fish is provided. Which paired statements

Identification of Organisms
Organisms and Environments
1
An illustration of two fish is provided.
Which paired statements could be used to distinguish the fish
using a dichotomous key?
A
Eyes on side of head
Eyes on top of head
B
One set of dorsal fins
Two sets of dorsal fins
C
Mouth at front of head
Mouth on underside of head
D
Rounded caudal fin
Forked caudal fin
1
Identification of Organisms
Organisms and Environments
2
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.
A
Leaf 1
B
Leaf 2
C
Leaf 3
D
Leaf 4
2
Identification of Organisms
Organisms and Environments
3
A table of arachnid and insect characteristics is shown.
Which characteristic could be used to distinguish between
arachnids and insects?
4
A
Jointed legs
B
Body segments
C
Presence of eyes
D
Presence of antennae
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?
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
3
Identification of Organisms
Organisms and Environments
5
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?
A
Antennae length
B
Placement of eyes
C
Markings on abdomen
D
Width of thorax
4
Identification of Organisms
Organisms and Environments
6
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?
A
Cornetfish
B
Flounder
C
Puffer fish
D
Snapper
5
Identification of Organisms
Organisms and Environments
7
An illustration of an organism and a dichotomous key are given.
What is the organism?
A
Arachnid
B
Dragonfly
C
Fruit
D
Mayfly
6