Cnidocytes are used for
1.Anchorage
2.Defence
3.Capturing of prey
4.All of these
Alternation of generation is present in
1.Sea-pen
2.Sea-fan
3.Obelia
4.Sea anemone
Which of the following is not true about Cnidarians
1.Radial symmetry
2.Diploblastic
3.Tissue level of organisation
4.Deutrostomes
Match the following organism with their respective characteristics:
Column I | Column II | ||
(a) | Pila | (i) | Flame cells |
(b) | Bombyx | (ii) | Comb plates |
(c) | Pleurobrachia | (iii) | Radula |
(d) | Taenia | (iv) | Malpighian tubules |
Select the correct option from the following:
Options: | (a) | (b) | (c) | (d) |
1. | (iii) | (ii) | (iv) | (i) |
2. | (iii) | (ii) | (i) | (iv) |
3. | (iii) | (iv) | (ii) | (i) |
4. | (ii) | (iv) | (iii) | (i) |
Metagenesis is not present in
1.Obelia
2.Adamsia
3.Pennatula
4.Both 2 and 3
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
Stinging capsule present in Cnidarians is called
1.Nematocysts
2.Choanocytes
3.Cnidocytes
4.Both 2 and 3
The distinctive feature of Cnidarians is
1.Cnidoblast
2.Polyp and Medusa form
3.Gastro-vascular cavity
4.Hypostome
The umbrella shaped and free-swimming form of Cindarians is not present in
1.Aurelia
2.Jellyfish
3.Adamsia
4.Both 1 and 2