Question

question 13 of 25
which is a correct interpretation of the cladogram shown below?
a. amoeba are multicellular.
b. koalas evolved after trout.
c. trout do not have segmented bodies.
d. trout and koalas are in the same class.

Explanation:

Step1: Analyze option A

Amoeba is on the branch of unicellular, so amoeba are unicellular, not multicellular.

Step2: Analyze option B

In a cladogram, the later - branching organisms evolved after the earlier - branching ones. Koala branches after trout, so koalas evolved after trout.

Step3: Analyze option C

Trout is on the branch that has the characteristic of segmented body (since it is after the "Segmented Body" node), so trout have segmented bodies.

Step4: Analyze option D

Trout is a fish and koala is a mammal. They are in different classes.

Answer:

B. Koalas evolved after trout.