Question

a fossilized fish is found that has jaws but no true bones. where does this fossil belong on the cladogram?
a
b
c
d

Explanation:

1. Analyze the cladogram traits:

• Trait "Jaws" evolves after splitting from D and C. So A, B share jaws; C, D do not.
• Trait "Bones" evolves after splitting from B. So A has bones; B does not.

1. Match the fossil: It has jaws (eliminates C, D) and no true bones (eliminates A). This matches the traits of position B.

Answer:

B