The central cavity of the sponges is known as

1.	spongocoel	2.	Ostia
3.	Osculum	4.	Gastro-vascular cavity

The minute pores in the  body wall of the sponges is known as

1.spongocoel

2.Ostia

3.Osculum

4.Spicules

Water canal is lined by

1.Spongin fibres

2.Choanocytes

3.Collar cells

4.Both 2 and 3

Canal system in sponges helps in

In sponges, digestion is

1.Intercellular

2.Intracellular

3.Both inter and inter cellular

4.Gastric cavity

The mode of reproduction in sponges is

Which of the following is true about sponges except

1.Sponges are hermaphrodite

2.Fertilisation is internal

3.Development is direct

4.Primitive multicellular animals

Find the incorrect match

Which one of the following is incorrect about Porifera?

Which of the following cell of sponges contains flagella

1.Nematocyst

2.Spongioblast

3.Amoebocyte

4.Choanocytes