Cells secreting calcareous spicules are called:
A.Nematocysts
B.Archacocytes
C.Calcoblasts
D.Desmocytes
A.Nematocysts
B.Archacocytes
C.Calcoblasts
D.Desmocytes
A.Cellular grade of organization where there are no organs and systems
B.Tissue grade of organization where there are organs and systems in the body
C.Both of these patterns
D.None of these patterns
A.Presence of many pores in the body
B.Presence of flagellated cells in body
C.Present of mesogloea
D.None of these
A.Nematocysts
B.Choanocytes
C.Epithelial cells
D.Amoebocytes
A.Spongioblasts
B.Calcoblasts
C.Silicoblasts
D.Osteoblasts
A.Ova mature first
B.Sperms mature first
C.Sponges are urusexual
D.None of these
A.Monaxon
B.Trixon
C.Tetraxon
D.Axon
A.Ellis
B.Crant
C.Huxley
D.None of these
A.Phagocytes
B.Thesocytes
C.Collencytes
D.None of these
A.Water current flowing constantly through their body
B.Branched colonial pattern of their structure
C.Presence of skeleton in their body
D.None of these