Question

Which is not found in vertebrates?

• A. Gill opening
• B. Bilateral symmetry
• C. Cnidoblasts
• D. Body scales

Answer 1

The correct option is C Cnidoblasts

A. Gill openings are called gill slits. Gill slits are present in vertebrates.

B. Vertebrates have bilateral symmetry, in which a lengthwise vertical plane divides the body into equal and opposite halves.

C. Cnidoblasts are the cells that contain stinging capsules and are found in Coelenterates.

D. Body scales are the appendages on the surface of the skin and are found in vertebrates.

Hence, Cnidoblasts are not found in vertebrates. So, the correct answer is 'Cnidoblasts'.