Question
Biology Question on Classification of animals
Radial symmetry is NOT found in adults of phylum ______.
A
Hemichordata
B
Coelenterata
C
Echinodermata
D
Ctenophora
Answer
Hemichordata
Explanation
Solution
Radial symmetry is a characteristic feature found in animals that exhibit symmetry around a central axis, like spokes on a wheel. In adults of phyla such as Coelenterata (Cnidaria), Echinodermata, and Ctenophora, radial symmetry is commonly observed.
Hemichordates, on the other hand, are more complex and generally exhibit bilateral symmetry as adults.
Therefore, the correct option is (A): Hemichordata.