The name of the phylum Cnidaria is derived from the
1.Nematocysts
2.Cnidoblasts
3.Cnidocytes
4.Both 2 and 3
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
1.Polyp produce medusae asexually
2.Medusae produce polyp sexually
3.Polyp produce medusae sexually
4.Obelia shows metagenesis