Veins are absent in:
A.Cockroach
B.Earthworm
C.Snail
D.Hydra
A.Cockroach
B.Earthworm
C.Snail
D.Hydra
A.Supplying materials
B.Support
C.Folding
D.Movement
A.Cockroach
B.Earthworm
C.Prawn
D.Star-fish
A.Digestion of food
B.Absorption of food
C.Retention of ventricular epithelium
D.Excretion
A.Have crtilagenous rings
B.Have no-collagsible walls
C.Are paired and branched
D.Are endodermal in origin
A.Mosquito
B.Earthworm
C.Ascaris
D.None of these
A.Tarsus
B.Pretarsus
C.Trochanter
D.Coxa
A.One pairs only
B.Two pairs
C.Single
D.None of these