Number of tentacles in Hydra is:
A.2 ? 4
B.4 ? 10
C.10 ? 20
D.40 ? 50
Category: Phylum Cnidaria or Coelentrata Mcqs
Hydra egests undigested food residues through:
A.Aboral pore
B.Mouth
C.Both (a) & (b)
D.None of these
Sexual reproduction in Hydra occurs during:
A.Hot months
B.Winter months
C.Both (a) & (b)
D.None of these
Hydra reduces its body by contraction:
A.Epidermals ribres
B.Gastrodermis
C.Interstitial cells
D.None of these
Hydras are:
A.Polypoid forms
B.Medusoid forms
C.Both (a) & (b)
D.None of these
Colony of Obelia is:
A.Free floating
B.Fixed
C.Swimming
D.None of these
A hydrozoan polyp is:
A.Bilaterally symmetrica
B.Radially symmetrical
C.Irregularly symmetrical
D.None of these
There are no special respiratory organs in:
A.Insects
B.Cnidarians
C.Molluscs
D.All of these
Division of labour in multicellular animals means:
A.All functions by a single cell
B.A single function performed by various cells jointly
C.Different functions by different cell types
D.Similar functions by different types of cells
An association mutually beneficial to both partners is represented by:
A.Men and honey bee
B.Zoochlorellae and Hydra
C.Hydra and water fleas
D.Farmer and earthworm
