Stinging capsule present in Cnidarians is called

1.Nematocysts

2.Choanocytes

3.Cnidocytes

4.Both 2 and 3

Cnidocytes are used for

1.Anchorage

2.Defence

3.Capturing of prey

4.All of these

The distinctive feature of Cnidarians is

1. Cnidoblast

2. Polyp and Medusa form

3. Gastro-vascular cavity

4. Hypostome

Which of the following is true about Gastro-vascular cavity of Cnidarians?

1.It contains single opening

2.Mouth on hypostome

3.Anus on hypostome

4.Both 1 and 2

The sessile and cylindrical form of Cnidarians is called as

1.Medusa

2.Polyp

3.Both 1 and 2

4.Neither medusa nor Polyp

The umbrella shaped and free-swimming form of Cindarians is not present in

1. Aurelia

2. .Jellyfish

3. Adamsia

4. Both 1 and 2

Metagenesis is not present in

1.Obelia

2.Adamsia

3.Pennatula

4.Both 2 and 3

Alternation of generation is present in

1.Sea-pen

2.Sea-fan

3.Obelia

4.Sea anemone

Which of the following is incorrect statement

Which of the following is known as Portugese man of war?

1.Pennatula

2.Adamsia

3.Meandrina

4.Physalia