OESOPHAGUS STOMACH
ECHINODERMS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
basket star
|
|
|
sea lily
|
|
|
sea cucumber
|
|
|
sea star
|
Detailed explanation-1: -The Ophiuroidea contain two large clades, Ophiurida (brittle stars) and Euryalida (basket stars).
Detailed explanation-2: -Ophiuroids exhibit the three distinctive characteristics of the phylum Echinodermata: a body plan with five part symmetry (pentaradial), an internal calcium carbonate skeleton in the mineral form of calcite, and a water vascular system of fluid-filled vessels that end in tube feet.
Detailed explanation-3: -Echinoderms, which are exclusively marine animals, are divided into five classes, the Asteroidea (starfishes), Ophiuroidea (serpent-stars), Echinoidea (sea-urchins, heart-urchins, and sand-dollars), Holothuroidea (sea-cucumbers), and Crinoidea (sea-lilies and feather-stars).
Detailed explanation-4: -Overview. Ophiuroidea are commonly known as brittle stars based on the fragile nature of their snake-like arms.