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

1.Food gathering

2.Respiratory exchange

3.Removal of waste

4.All of the above

In sponges, digestion is

1.Intercellular

2.Intracellular

3.Both inter and inter cellular

4.Gastric cavity

The mode of reproduction in sponges is

1.Sexual

2.Asexual

3.Both 1 and 2

4.None of these

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

1.Sycon-Scypha

2.Spongilla-Fresh water sponge

3.Euspongia- Bath sponge

4.Sycon- Bath sponge

Which one of the following is incorrect about Porifera?

1.Presence of spongin fibres

2.Cellular level of organisation

3.Presence of mouth and digestive cavity

4.Pores all over the body

Which of the following cell of sponges contains flagella

1.Nematocyst

2.Spongioblast

3.Amoebocyte

4.Choanocytes