Phylum Cnidaria

Q. Which of the following pairs of organisms possess stinging cells nematocytes?

1. Sea fan and Sea pen
2. Cobra and Scorpion
3. Cockroach and Mosquito
4. Wasp and Honey bee

Q. Metagenesis refers to

1. presence of a segmented body
2. presence of a coelom
3. alternation of generation between the asexual and sexual phase of an organism
4. the occurrence of drastic marked changes in structure after birth to become an adult

Q.

Solenocytes and nephridia are respectively found in

1. Mollusca and Echinodermata

2. Cnidaria and Mollusca

3. Annelids and Nematoda

4. Platyhelminthes and annelids

Q.

Tentacles of Hydra help in:

1. Locomotion

2. Food capturing

3. Both A & B

4. None of these

Q.

Does a jellyfish have radial symmetry?

Q.

Do corals possess radial symmetry?

Q. The poisonous fluid present in nematocyst of Hydra is

1. venom
2. haematin
3. toxin
4. hypnotoxin

Q. One of the unique characteristics of Coelenterata is

1. bioluminescence
2. flame cells
3. being hermaphrodite
4. cnidoblast

Q.

Which two functions do nematocysts perform?

Q. In Hydra, egestion of undigested food and excretion of nitrogenous waste occurs through

1. mouth and anus, respectively
2. mouth and body surface, respectively
3. anus and body wall, respectively
4. mouth and tentacles, respectively

Q.

Do jellyfish have barbs?

Q. State whether true or false:
Poriferans and Cnidarians are radially symmetrical.

1. True
2. False

Q. Match List-I with List-II.
$\begin{array}{cccc}& \text{List-I}& & \text{List-II}\\ \text{(a)}& \text{Metamerism}& \left(i\right)& \text{Coelenterata}\\ \text{(b)}& \text{Canal system}& \left(ii\right)& \text{Ctenophora}\\ \text{(c)}& \text{Comb plates}& \left(iii\right)& \text{Annelida}\\ \text{(d)}& \text{Cnidoblasts}& \left(iv\right)& \text{Porifera}\end{array}$
Choose the correct answer from the options given below.

1. a - iv, b - i, c - ii, d - iii
2. a - iii, b -iv, c - ii, d - i
3. a - iv, b - iii, c - i, d - ii
4. a - iii, b - iv, c- i, d- ii

Q. Many Cnidarians have two distinct life stages called -

1. gametophyte and sporophyte
2. pupae and larvae
3. polyp and medusa
4. larvae and adult

Q. One of the unique characteristics of Coelenterata is

1. bioluminescence
2. flame cells
3. being hermaphrodite
4. cnidoblast

Q. The first, second and third moulting of Ascaris larvae occur in

1. soil, alveoli and lung
2. liver, soil and stomach
3. soil, lung and liver
4. soil, lung and intestine

Q. Which of the following pairs of organisms possess stinging cells nematocytes?

1. Sea fan and Sea pen
2. Cobra and Scorpion
3. Cockroach and Mosquito
4. Wasp and Honey bee

Q. Corals belong to the phylum

1. Protozoa
2. Porifera
3. Cnidaria
4. Ctenophora

Q. Select the Taxon mentioned that represents both marine and fresh water species :

1. Echinoderms
2. Ctenophora
3. Cephalochordata
4. Cnidaria

Q. The poisonous fluid present in nematocyst of Hydra is

1. venom
2. haematin
3. toxin
4. hypnotoxin

Q.

Give the zoological name of (d) fresh water sponge.

Q. Which of the following statements regarding coelenterates are wrong?
I. Cnidocytes are present on the tentacles and on the body
II. They are diploblastic and have cellular level of organisation
III. Polyp forms are free-swimming
IV. They exhibit metagenesis
V. Polyps produce medusae sexually and medusae form polyps asexually

1. II and IV only
2. III and V only
3. I, II and III only
4. II, III and V only

Q. The phylum Cnidaria gets its name because of the presence of

1. Gastrovascular cavity
2. Stinging cells
3. Metagenesis
4. Tentacles