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
Meandrina which is also known as Brain Coral is a
(1) Poriferan
(2) Coelenterate
(3) Echinoderm
(4) Mollusc
Match the following
1) | Pennatula | (i) | sea fan |
2) | Gorgonia | (ii) | brain coral |
3) | Meandrina | (iii) | sea anemone |
4) | Adamsia | (iv) | sea pen |
1. 1-(i), 2-(ii), 3-(iii), 4-(iv)
2. 1-(iv), 2-(i), 3-(ii), 4-(iii)
3. 1-(iv), 2-(ii), 3-(iii), 4-(ii)
4. 1-(i), 2-(iv), 3-(iii), 4-(ii)
Which of the following group consists exclusively of cnidarians?
(1) Aplysia, Gorgonia, Spongilla, Hydra
(2) Hydra, pennatula, obelia, Echinus
(3) Hydra, obelia, adamsia, physalia
(4) Scypha, Hydra, adamsia, physalia
Stinging capsules (nematocysts) are found in
(1) wasp and honeybee
(2) scorpion and cobra
(3) sea pen and sea fan
(4) cactus and Venus flytrap
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
Physalia is a coelenterate which is also known as
(1) sea pen
(2) sea fan
(3) Portuguese man of war
(4) sea anemone
Which of the following germinal layer is absent in Cnidarians
1.Ectoderm
2.Endoderm
3.Mesoderm
4.Both 2 and 3
Which of the following is known as Portugese man of war?
1.Pennatula
2.Adamsia
3.Meandrina
4.Physalia