Echinoderms have a spiny skeleton made of …….plates.
a) chitinous
b) calcareous
c) silicates
d) collageneous
Body of echinoderms consists of…….
a) epidermis, middle dermis and an inner lining of peritoneum
b) epidermis, middle dermis and an outer lining of peritoneum
c) cuticle , middle dermis and an inner lining of peritoneum
d) epidermis, middle dermis and endoderm
Digestive system of echinoderms consists of……..
a) a short coiled tube
b) the alimentary canal with ten pairs of pyloric caecae
c) the digestive glands
d) all of these
All echinoderms are…….
a) carnivores
b) herbivores
c) omnivores
d) detritus
Explanation: including starfish. Food mainly consists of oysters, clams, mussels
In starfish, respiration occurs through…
a) papule
b) peristomical gills
c) genetal bursae
d) cloacae
In sea urchins, respiration occurs through
a) papule
b) peristomical gills
c) genetal bursae
d) cloacae
