Phylum Ctenophora

Q.

Biradial symmetry and lack of cnidoblasts are the characteristics of

1. starfish and sea anemone

2. ctenoplana and Beroe

3. aurelia and Paramecium

4. hydra and starfish.

Q. Bodies of the comb jellies have external rows of comb plates.

1. 7
2. 8
3. 9
4. 10

Q. Choanocytes are present in body of animals associated with phylum _____________.

1. Porifera
2. Coelentrate
3. Aschelminthes
4. Hemichordate

Q. Give two examples of phylum Ctenophora.

Q.

Which of the following group of animals is bilaterally symmetrical and triploblastic?

1. ctenophores

2. coelenterates

3. sponges

4. aschelminthes

Q.

Rhytidiadelphus squarrosus, Bryum argenteum, Ceratodon purpureus, Fontinalis antipyretica and Sphagnum are common examples of_____

1. Liverworts

2. Algae

3. Mosses

4. Hornworts

Q. Group of protistans which lack locomotory structures belongs to

1. Euglenoids
2. Dinoflagellates
3. Amoeboid protozoans
4. Sporozoans

Q. Which amoebocytes of sponges is responsible for forming endoskeleton?

1. Scleroblast cells
2. Archaeocytes
3. Porocytes
4. Chromocytes

Q. Flagellated collar cells (choanocytes) is the characteristics of ___________.

1. Cnidaria
2. Arthropoda
3. Porifera
4. None of the above

Q. An echinoderm which can both creep and swim actively is

1. Oreaster
2. Ophiothrix
3. Echinus
4. Cucumaria

Q. In Porifera, the skeleton forming cells are called as

1. Amoebocytes
2. Thesocytes
3. Archaeocytes
4. Sclerocytes

Q. Amphidisc spicules are seen in

1. Leucosolenia
2. Spongilla
3. Hyalonema
4. Sycon

Q. An animal that does not perform locomotion is

1. Sycon
2. Nereis
3. Euglena
4. Sepia

Q. Which invertebrate phylum shows the characteristics of having spines on their endoskeleton, radial symmetry and water vascular system?

1. Annelida (earthworms)
2. Porifera (sponges)
3. Echinodermata (starfishes and sea urchins)
4. Mollusca (snails and slugs)
5. Arthropoda (insects, crabs and scorpions)

Q. Arms, pedicellariae and spines are absent in which of the following echinoderm?

1. Sea Cucumber
2. Star Fish
3. Sea Lily
4. Sea Urchin

Q. A test is present in echinoderm

1. Asterias
2. Echinocardium
3. Antedon
4. Ophiura