Which of the following is true about the given organism?
1.It is a medusa form of Aurelia
2.It is Fresh water sponge
3.Central canal system is present in it
4.It’s mouth is formed first
Which of the following is true about the following organism?
1. Radial symmetry is present
2. Fertilisation is external
3. Multicellular animal
4. Coelomate organism
Which of the following is not true about the given organism?
1.Bilateral symmetry is present
2.Hermaphrodite
3.Indirect development
4.Acoelomate organism
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