Hard calcium carbonate structures are used as a skeleton by

Which one is a true fish?

Classify the following animals into cold-blooded and warm-blooded categories: Rohu,Scoliodon,Flying lizard,King Cobra,Frog,Salamander,Ostrich,Pigeon,Bat,Crocodile,and Whale.

Write two characteristic features of the phylum to which Ascaris belongs. Name the parasitic worm that causes elephantiasis.

Which of the following is not a characteristic feature of Protochordata?

$(a)$ Associate any three phyla of Animalia with triploblastic body organisation and bilateral symmetry.
$(b)$ State the meaning of triploblastic body organisation and bilateral symmetry.
$(c)$ On the basis of presence or absence of coelom,compare the three phyla answered in $(a)$.