Dermal surface of Euplectella is made by:
A.Pinacocytes
B.Epithelial cells
C.Sponging fibres
D.Synegtial mass of amoeboid cells
Category: Phylum Porifera Mcqs
Cells secreting calcareous spicules are called:
A.Nematocysts
B.Archacocytes
C.Calcoblasts
D.Desmocytes
Sponges are primitive multicellular animals having:
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
The term porifera means
A.Presence of many pores in the body
B.Presence of flagellated cells in body
C.Present of mesogloea
D.None of these
Cells characteristic of sponges are:
A.Nematocysts
B.Choanocytes
C.Epithelial cells
D.Amoebocytes
Cells forming siliceous spicules are called:
A.Spongioblasts
B.Calcoblasts
C.Silicoblasts
D.Osteoblasts
Fertilization in sponges is by cross method because:
A.Ova mature first
B.Sperms mature first
C.Sponges are urusexual
D.None of these
Which of these is not a name for sponge spicules:
A.Monaxon
B.Trixon
C.Tetraxon
D.Axon
Animal nature of sponges was established by:
A.Ellis
B.Crant
C.Huxley
D.None of these
Cells picking up food from choanocytes are called:
A.Phagocytes
B.Thesocytes
C.Collencytes
D.None of these
