Phylum Porifera
Skeleton of sponges are made up of a fibrous protein called:
spongin
fibrin
fibrinogen
fibrous protein
spongin
Related posts
Needle-like spikes present on skeleton of sponges are called:A. needles
B. stinging cells
C. defensive cells
D. spicules
In sponges, exchange of water and diffusion is carried out by process of:
A. osmosis
B. active transport
C. diffusion
D. passive transport
A thin flat cell that covers outer surface of sponges are called:
A. porocytes
B. chondrocytes
C. pinacocytes
D. leukocytes
Collar cells of sponges are known as:
A. choanocytes
B. chondrocytes
C. pinacocytes
D. porocytes
Leave a Reply