Which of these do not have a ventral nerve cord:
A.Molluscs only
B.Annelids only
C.Arthropods only
D.Molluscs and echinoderms
A.Molluscs only
B.Annelids only
C.Arthropods only
D.Molluscs and echinoderms
A.Lamellidens
B.Metridium
C.Leech
D.House-fly
A.Chemoreceptor
B.Tactile
C.Photosensory
D.Statoreceptor
A.Silica only
B.CaCO3
C.CaCO3 + Chochilin
D.Silica + CaCO3
A.House-fly
B.Pila
C.Lamellidens
D.Leech
A.Glochidium
B.Trochophore
C.Valiger
D.None of these
A.Echinodermata
B.Annelida
C.Mollusca
D.Arthropoda
A.Digestion of carbohydrates
B.Digestion of proteins
C.Digestion of fats
D.Absorption of food
A.Pila
B.Lamellidens
C.Star-fish
D.None of these
A.Lamellidens and Pila
B.Ostrea
C.Octopus
D.Prawn