Identifying Unknown Organisms

Question 1

Which are observations about the tree on the right? Check all that apply.

Revolt · Accepted Answer

The leaves are dark green.; The leaves are needle-like.; The leaves are attached to the stem.

Question 2

Which question is most likely to be found in a dichotomous key for fish identification?

Revolt · Accepted Answer

Does it have a rounded tail?

Question 3

A leaf is used to identify a tree as an ash. What are the characteristics of the leaf? Find “ash” on the key on the right and work backward to find the characteristics.

Revolt · Accepted Answer

broad leaf, compound leaf, leaves attached at many points, leaf bases attached opposite each other on branch.

Question 4

Why are dichotomous keys used?

Revolt · Accepted Answer

to identify an organism based on characteristics of known organisms

Identifying Unknown Organisms Answers

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