Question

Which one of the following belongs to class-Diplopoda?

• A. Balanus
• B. Sacculina
• C. Scolopendra
• D. Julus

Hint:

To differentiate Myriapod classes:

\textbf{Diplo}poda = \textbf{Di} (two) pods (feet) \(\rightarrow\) Millipedes (two pairs of legs per segment).
\textbf{Chilo}poda = Centipedes (one pair of legs per segment). \end{itemize} Remembering that "milli" means thousand (an exaggeration) and "centi" means hundred helps distinguish the two groups.

Answer 1

The Correct Option is D

Step 1: Concept Overview:
The task is to identify the Diplopoda organism. Diplopoda includes millipedes, classified under Subphylum Myriapoda.

Step 2: Option Analysis:
- Balanus: Acorn barnacles, Class Crustacea.
- Sacculina: Parasitic barnacles, Class Crustacea.
- Scolopendra: Giant centipedes, Class Chilopoda. Distinguished from Diplopoda by having one leg pair per body segment.
- Julus: Millipedes, Class Diplopoda. Characterized by two leg pairs per body segment (diplosegments).

Step 3: Conclusion:
{Julus}, a millipede, belongs to Class Diplopoda. Therefore, option (D) is correct.