Question Detail
Question
The basic structural plan of limbs in most vertebrates is called:
Correct Answer
Option B is the correct answer.
Detailed Explanation
Most vertebrates are built on the same basic plan called the pentadactyl limb plan (5-digit plan). This ancestral pattern consists of a single proximal bone, two distal bones, and five digits, though many species have modified this pattern.
Hint
This plan involves five digits, though they may be modified or reduced in some species.