Question

A dichotomous key is used to identify a plant below.

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. Leaf edge is rough.............................Ulmus americana

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

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



A plant has a broad single leaf with smooth edges. What type of plant is this?

(1 point)
Responses

Juglans nigra
Juglans nigra

Ulmus americana
Ulmus americana

Pinus taeda
Pinus taeda

Cornus florida

Answer 1

The plant described as having a broad single leaf with smooth edges corresponds to **Cornus florida**.

According to the dichotomous key:

- It has broad leaves (1b goes to 2).
- It has a single leaf (2a goes to 3).
- The leaf edge is smooth (3a identifies it as Cornus florida).

So the correct response is **Cornus florida**.