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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

Animal nature of sponges was established by:

A.	Ellis	B.	Crant
C.	Huxley	D.	None of these

Ellis established the animal nature of these animals on the basis of:

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

Which of these is true for sponges:

A.	Several mouths and only one exit chitinous spicules	B.	Chitinous spicules
C.	One mouth and several exits in the body	D.	A large stomach

Who used the term porfera for sponges:

A.	Ellis	B.	Grant
C.	Huxley	D.	Sollas

The study of morphology and physiology of sponges was done by:

A.	Grant	B.	Ellis
C.	Sollas	D.	None of these

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

The term 'parazoa' for sponges was used by:

A.	Sollas	B.	Grant
C.	Ellis	D.	None of these

Sponges are :

A.	Bilaterally symmetrical	B.	Radially symmetrical
C.	Asymmetrical and radial	D.	Asymmetrical

10.

Which of these is not a name for sponge spicules:

A.	Monaxon	B.	Trixon
C.	Tetraxon	D.	Axon