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

1.Polyp produce medusae asexually

2.Medusae produce polyp sexually

3.Polyp produce medusae sexually

4.Obelia shows metagenesis

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

1.Pennatula

2.Adamsia

3.Meandrina

4.Physalia

Which of the following  not started from Cnidarians?

1.Tissue level of Organisation

2.Radial symmetry

3.Diploblastic body plan

4.Presence of mesoderm

In which of the following form metamerism is present

1.Obelia

2.Hydra

3.Sea anemone

4.None of the above

Which of the following germinal layer is absent in Cnidarians

1.Ectoderm

2.Endoderm

3.Mesoderm

4.Both 2 and 3