Cnidocytes are used for

1.Anchorage

2.Defence

3.Capturing of prey

4.All of these

Meandrina which is also known as Brain Coral is a

(1) Poriferan

(2) Coelenterate

(3) Echinoderm

(4) Mollusc

Match the following

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)

Alternation of generation is present in

1.Sea-pen

2.Sea-fan

3.Obelia

4.Sea anemone

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 known as Portugese man of war?

1.Pennatula

2.Adamsia

3.Meandrina

4.Physalia

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 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

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 germinal layer is absent in Cnidarians

1.Ectoderm

2.Endoderm

3.Mesoderm

4.Both 2 and 3