Dichotomous key

What is the purpose of a dichotomous key?

• to find a common ancestor

• to show relationships between organisms

• to show the evolution of organisms

• to classify organisms

From the table, which two animals are MOST CLOSELY related

• House Cate and Red Fox

• Dog and Wolf

• Red Fox and Dog

• Wolf and Gopher

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

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

• diet

• weather patterns

• environment

• physical features

Tags

NGSS.MS-LS4-2

The first part of a scientific name is an organism's _______________ and the second part is its ________________.

• species, genus

• class, spices

• phylum, order

• genus, species

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

• Class Insecta

• Order Araneae

• Order Amblygygi

• Order Scorpiones

A table of arachnid and insect characteristics is shown. Which characteristic could be used to distinguish between

arachnids and insects?

• Jointed legs

• Presence of eyes

• Body segments

• Presence of antennae

What is the name of bird W?

• Certhidea

• Geospiza

• Camarhynchus

• Platyspiza

Tags

NGSS.MS-LS4-2

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

• Coleoptera

• Diptera

• Heteroptera

• Lepidoptera

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

• Its leaves curl up on the edges.

• It is wet from a recent rain storm.

• It is eaten by native jungle ants.