Question

Tentacles are branched and retractile in

• A. Holothuria
• B. Cucumaria
• C. Echinus
• D. All of the above

Answer 1

The correct option is B Cucumaria

A) Tentacles are unbranched and not retractile in Holothuria.

B) Cucumaria or Sea Cucumber is a limbless echinoderm. The oral end contains a whorl of ten dendritic, bushy, pinnate, branched tentacles surrounding the terminal mouth. These tentacles are modified tubes and are used to capture prey and hence, are present at the oral end.

C) Tentacles are unbranched and not retractile in Echinus.

D) Tentacles are unbranched and not retractile in Holothuria and Echinus.

So, the correct answer is 'Cucumaria'.