AnswersBiology - SC3209 ICIdentifying Unknown Organisms — Unit testQuestion 3
3
QuizMultiple Choice

Identifying Unknown Organisms — Unit test

Question 3 • Biology - SC3209 IC

Use this portion of a dichotomous key for tree identification to answer the question.1a. Needlelike leaf ® Step 101b. Broad leaf ® Step 22a. Compound leaf ® Step 32b. Simple leaf ® Step 77a. Leaf bases attached opposite each other on branch ® Step 87b. Leaf bases attached staggered on branch ® Step 118a. Leaves lobed ® Maple8b. Leaves not lobed ® Step 99a. Leaves heart shaped ® Catalpa9b. Leaves not heart shaped ® DogwoodWhich best describes dogwood leaves?

Answer
A
They are lobed, simple leaves and are attached staggered on the branch.
B
They are not heart shaped and are attached staggered on the branch.
C
They are compound, broad leaves and are attached oppositely on the branch.
D
They are nonlobed, simple leaves and are attached oppositely on the branch.

Explanation

Follow the key backward from Dogwood: it has leaves that are not heart shaped (9b), and they are not lobed (8b). To reach step 8, the leaf bases must be attached opposite each other (7a); step 2 also shows they are simple, broad leaves. Therefore, choice D, nonlobed, simple leaves attached oppositely, best describes dogwood leaves.

AI-written and checked against the verified answer.

Next

More from this Course

Quiz
28 verified answers

Unit Test

Quiz
16 verified answers

Unit Test

Quiz
15 verified answers

Unit Test