A dichotomouys key is used to identify a plant.

Question

1a. Leaves are spiny ......................Pinus taeda

1b. Leaves are broad..................... Go to 2

2a. Single leaf..........................Go to 3

2b. Many leaves....................... Go to 4

3a. Leaf edge is smooth..............Cornus florida

3b. Lead edge is rough...............Ulmus americana

4a. Leaflet edges are smooth........Albizia julibrissin

4b. Leaflet edges are rough.........Juglans nigra

A plant has many broad leaves with rough edges. What type of plant is this?

(1 point)
Responses

pinus taeda
pinus taeda

albizia julibrissin
albizia julibrissin

cornus florida
cornus florida

juglans nigra

Answer 1

The plant you described has many broad leaves with rough edges. According to the dichotomous key:

1b indicates that the plant has broad leaves and leads us to step 2.

2b indicates that the plant has many leaves, leading us to step 4.

4b indicates that the leaflet edges are rough, which corresponds to:

Juglans nigra.

So, the correct response is Juglans nigra.