Question

In trilobites, the biramous appendages give rise to the two branches. The one used for walking is also known as:

• A. Coxa
• B. Semipodite
• C. Outer ramus
• D. Telopodite

Hint:

In trilobite biramous appendages, the walking branch is known as telopodite.

Answer 1

The Correct Option is D

Concept:
Trilobites had biramous appendages, meaning each appendage was divided into two branches.

Step 1: Understand biramous appendage.
A biramous appendage has two main branches: \[ \text{Outer branch} \] and \[ \text{Inner branch} \]

Step 2: Function of the walking branch.
The walking branch of the trilobite appendage is called the telopodite. \[ \text{Walking branch}=\text{Telopodite} \]

Step 3: Eliminate other options.
Coxa is a basal part.
Outer ramus is generally related to the outer branch.
Semipodite is not the correct term for the walking branch in this question. \[ \therefore \text{Correct Answer is (D)} \]