Dichotomous Key Worksheet

Which of the following is most helpful for identifying an organism using a dichotomous key?

• Its physical structures.

• Its average lifespan.

• Its sources of food.

• Its habitat.

Tags

NGSS.MS-LS4-2

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

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

• 1
• 2
• 3
• 4

What is the name of bird W?

• Certhidea
• Geospiza
• Camarhynchus
• Platyspiza

Tags

NGSS.MS-LS4-2

What is the name of bird Z?

• Certhidea
• Geospiza
• Camarhynchus
• Platyspiza

Tags

NGSS.MS-LS4-2

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

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

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

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

What is the purpose of a dichotomous key?

• to find a common ancestor
• to show the evolution of organisms
• to see what organisms eat
• to identify organisms

A labeled illustration of a shark is provided, along with a dichotomous key. Using the dichotomous key, what shark is shown?

• Cow shark

• Great white

• Hammerhead

• Saw shark

Tags

NGSS.MS-LS4-2

Which of the following is an accurate description of the fiddler crab?

• 3 Paris of walking legs on both sides

• Two propodus

• 3 Chelipeds

• A pair of eyes

Tags

NGSS.MS-LS4-2