Dichotomous Key Assessment

Is the right answer for classifying this organism chosen on this dichotomous key?

• Yes

• No

Which of these categories would likely NOT appear on a dichotomous key?

• Has fur/does not have fur

• Has wings/has no wings

• Carnivore/herbivore/omnivore

• Is mean/is nice

If you were creating a dichotomous key for ocean animals, which question would separate dolphins from sharks?

• Is the animal a vertebrate?

• Is the animal a cranivore?

• Does the animal have fins?

• Does the animal breathe through gills?

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

• Coleoptera

• Heteroptera

• Diptera

• Lepidoptera

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

• physical features

• weather patterns

• environment

• diet

Tags

NGSS.MS-LS4-2

Which of the paired statements could be used to tell the difference between the two insects using a dichotomous key?

• Has 6 legs

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

• Class Insecta

• Order Amblygygi

• Order Araneae

• Order Scorpiones

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

Tags

NGSS.MS-LS4-2

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.

A student discovers an arachnid without a segmented abdomen, and legs longer than its body. The student uses the dichotomous key below to identify it. Which arachnid has the student found?

• Whip Scorpion

• Wind Scorpion

• Daddy long legs

• Scorpion