17.1 Using keys_3

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

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.

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

• 1

• 2

• 3

• 4

What is the name of bird Z?

• Certhidea

• Geospiza

• Camarhynchus

• Platyspiza

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?

• Whip Scorpion

• Wind Scorpion

• Daddy long legs

• Scorpion

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

Tool used by a taxonomist to identify an unknown organism is a:

• dichotomous key

• binomial nmenclature

• scientific name

• binomial key