What do scientists examine when they use a dichotomous key?(1 point)

Question

Responses

observable features of an organism
observable features of an organism

behaviors of an organism
behaviors of an organism

kinds of foods eaten by an organism
kinds of foods eaten by an organism

environment of an organism

Answer 1

observable features of an organism

Answer 2

Use the dichotomous key to answer the question.

Dichotomous Key

1a. Needle leaves: go to step 2

1b. Non-needles leaves: go to step 3

2a. Needles are grouped in clusters: pine tree

2b. Needles are individually arranged: spruce tree

3a. Simple (individual) leaves: go to step 4

3b. Compound leaves (leaflets): go to step 5

4a. Leaf edge is smooth and lobed: oak tree

4b. Left edge is rough and tooth-like: elm tree

5a. Leaflets are attached at one point: chestnut tree

5b. Leaflets are attached at many points: walnut tree



Examine the leaf.

Non-needle green leaf with compound leaves attached at the center.

What kind of tree is the leaf from?

(1 point)
Responses

chestnut
chestnut

elm
elm

walnut
walnut

oak
oak
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Answer 3

chestnut