Dichotomous Key

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

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

• Its average lifespan
• Its sources of food
• Its habitat
• Its physical structures

Tags

NGSS.MS-LS4-2

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

• Migrates north every spring
• Hangs on brances to rest
• Flutters wings faster on hot days
• Hind wings have tail extensions

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

• Coleoptera
• Diptera
• Hereoptera
• Lepidoptera

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

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

• Cow shark
• Great white
• Hammerhead
• Saw shark

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

• Has 6 legs; 8 legs
• Large hind legs; Small hind legs
• 2 pairs of spots on wing cover; 3 pairs of spots on wing cover
• Antennae absent; Antennae present

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

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

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

• Arachnid
• Dragonfly
• Fruit
• Mayfly