Echinoderms are animals that belong to any member of the phylum Echinodermata. These animals are invertebrates having spiny skin which can easily be identified by their radial symmetry such as starfish, sea urchins, sand dollars, etc. This quiz has been developed to test your knowledge about different species which belong to Phylum Echinodermata. Read the questions carefully and answer. All the best!
Class Asteroidea - sea star
Class Ophiuroidea- feather star
Class Echinoidea – sea urchin
Class Holothuroidea- sea cucumber
True
False
They are all marine
Adult echinoderms have a dorsal nerve cord
Their larvae are planktonic
Their larvae are bilaterally symmetrical
Adult echinoderms have pentamerous symmetry
True
False
Is on its bottom side
Is where its mouth is
Is on its top side
A and b are correct
B and c are correct
The water vascular system ends in the tube feet
Tube feet are muscular
Tube feet are part of the endoskeleton
Tube feet are used for locomotion
Stimuli are received by the tube feet
Pentameral radial symmetry
A water vascular system
An internal skeleton
Tentacles that are used for locomotion
An organ system level of organization
True
False
Oral spine
Gills
Tube feet
Tentacles
Stone canal
Ring canal
Ambulacral canal
Radial canal
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