Bilateral and Radial symmetry

Radial symmetry is

Echinoderms are characterised by (a) Exclusively marine habitat and calcareous endoskeleton (b) Presence of water vascular system and tube feet for locomotion (c) Bilateral symmetry in larvae and radial symmetry in adults (d) All of these

The larval stage in Asterias is : (a). Absent (b). Free-swimming (c). Bilaterally (d) Radially symmetrical 1)Only (a) 2) (b) & (c) 3) (b) & (d) 4) Only (c)

Radial symmetry occurs is

The principal axis in radial symmetry is

Which of the following is bilateral symmetrical during larval stage and radially symmetrical during adult stage ?

Triploblastic, acoelomate and bilateral symmetry with most of parasitic forms. The above description is characteristic of the phylum :-

A: Echinoderms are the only radially symmetrical animals with true coelom. R: Echinoderms have secondarily adapted to radial symmetry.

When any plane passing through the central axis of the of the body divides the organism into two identical halves, it is radial symmetry. Which of the following set of animals has radial symmetry ?

Give examples for the following (a) Bilateral, dorsiventral symmetry is found in ……. . (b) Worms causing disease elephantiasis is …….. . (c ) Open circulatory system is found in …….. Where coelomic cavity is filled with blood (heamolymph). (d) ........ are known to have pseudocoelom.