CBSE
Which of the following have notochord throughout life?
Birds
Fish
Snake
Amphioxus
Tube feet is the locomotory organ in
starfish
jelly fish
silver fish
Scoliodon
Ruminants belong to order
Proboscida
Artiodactyla
Marsupials
Edentata
The echinoderms are
arborial insects
marine animals
terrestrial insects
freshwater forms
Shell of molluscs is derived from
foot
mantle
ctenidia
placoid
Animals having a built in thermostat to maintain constant body temperature are known as
biothermic
poikilothermic
oligothermic
homeothermic
Connecting link between annelids and molluscs is
Neopilina
Peripatus
Periplaneta
Limulus
During unfavourable conditions, the sponges form
cyst
encyst
spicule
Gemmule
Which of the following cell type is capable of giving rise to other cell types in sponges?
Thesocytes
Pinacocytes
Cnidocytes
Archaeocytes
Sea gulls excrete excess of NaCl from
liver
lungs
nasal activity
kidney