Discharge of nematocysts in Hydra depends upon:
A.Hormones
B.Proteins
C.Vitamins
D.Enzymes
A.Hormones
B.Proteins
C.Vitamins
D.Enzymes
A.Interstitial cells
B.Mucus gland cells
C.Enzyme cells
D.Epitheliomuscular cells
A.Porifera
B.Coelentrata
C.Platyhelminthes
D.Annelida
A.Emboly
B.Delamination
C.Invagination
D.Epiboly
A.Physaila
B.Obelia
C.Both (a) & (b)
D.None of these
A.Bilateral symmetry
B.Radial symmetry
C.Irregular symmetry
D.None of these
A.Earthworm
B.Cockroach
C.Frog
D.Hydra
A.Medusa only
B.Polyps only
C.Both (a) & (b)
D.None of these
A.Asexual and trophic phase
B.Sexual and trophic phase
C.Only sexual phawse
D.None of these
A.Sponges
B.Cnidarian
C.Earthworm
D.Helminths