Question
Question: Which one of the following exhibits concentric "tube within tube" plan...
Which one of the following exhibits concentric "tube within tube" plan
A
Arthropoda
B
Oligochaeta
C
Mollusca
D
Echinodermata
Answer
Oligochaeta
Which one of the following exhibits concentric "tube within tube" plan
Arthropoda
Oligochaeta
Mollusca
Echinodermata
Oligochaeta