Animal Kingdom Question 390
Question: Which one of the following exhibits concentric “tube within tube” plan [MP PMT 1999]
Options:
A) Arthropoda
B) Oligochaeta
C) Mollusca
D) Echinodermata
Show Answer
Answer:
Correct Answer: B
Solution:
Annelids like oligochaetes exhibit concentric ?tube within a tube? body plan with multicellularity and bilateral symmetry.