Tag: cnidaria

Questions Related to cnidaria

Select the correct one(s) for Ctenophora -

zoology animal diversity - i (inverterbrate phyla) ctenophora phylum ctenophora cnidaria

  1. They have similarities with Cnidaria

  2. They have 8 external rows of ciliated comb plates for locomotion

  3. Bioluminescene

  4. All

Show answer
Correct Option: D
Explanation:
Ctenophores, variously known as comb jellies, sea gooseberries, sea walnuts, or Venus's girdles, are voracious predators. Unlike cnidarians, with which they share several superficial similarities, they lack stinging cells. They have ciliated comb plates for locomotion and exhibit bioluminescence
So, the correct option is 'All'

Comb jelles or sea walnuts are placed under -

zoology animal diversity - i (inverterbrate phyla) ctenophora phylum ctenophora cnidaria

  1. Cnidaria

  2. Ctenophora

  3. Echinodermata

  4. Annelida

Show answer
Correct Option: B
Explanation:
Ctenophores, variously known as comb jellies, sea gooseberries, sea walnuts, or Venus's girdles, are voracious predators. Unlike cnidarians, with which they share several superficial similarities, they lack stinging cells.
So, the correct option is 'Ctenophora'

Find out the odd one.

zoology animal diversity - i (inverterbrate phyla) ctenophora phylum ctenophora cnidaria

  1. Adamsia

  2. Astraea

  3. Physalia

  4. Pleurobrachia

Show answer
Correct Option: D
Explanation:

Adamsia, Astraea and Physalia belong to the phylum Cnidaria (Coelenterata). Cnidarians are aquatic, mostly marine, solitary or colonial sessile or free swimming, radially symmetrical animals. These phyla are divided into three classes Hydrozoa, Scyphozoa, and Anthozoa. Pleurobrachia belongs to the phylum Ctenophora.

So the correct answer is 'Pleurobrachia'.

Biradial symmetry and lack of cnidoblasts are the characteristics of-

zoology animal diversity - i (inverterbrate phyla) ctenophora phylum ctenophora cnidaria

  1. Starfish and sea anemone

  2. Ctenoplana and Beroe

  3. Aurelia and Paramecium

  4. Hydra and starfish

Show answer
Correct Option: B
Explanation:
Ctenoplana and Beroe lack cnidobiasts and have brradial symmetry. These belong to phylum-Ctenophora. Hydra, sea anemone and Aurelia are coelenterates which have cnidoblasts. Although sea anemone has biradial symmetry.

So, the correct answer is 'Ctenoplana and Beroe'.

Match list I with list II and select the correct option.

List I List II
a. Protozoa 1. Cleiona
b. Aschelminthes 2. Beroe
c. Porifera 3. Monocystis
d. Ctenophora 4. Wuchereia
e. Cnidaria 5. Pennatula
zoology animal diversity - i (inverterbrate phyla) ctenophora phylum ctenophora cnidaria

  1. a- 3, b- 4, c- 1, d- 2, e- 5 

  2. a- 4, b- 3, c- 1, d- 2, e- 5 

  3. a- 5, b- 4, c- 1, d- 2, e- 3 

  4. a- 1, b- 4, c- 3, d- 2, e- 5 

Show answer
Correct Option: A
Explanation:

Beroe (comb jellyfish) belong to the Ctenophora. Monocystis is an endoparasite found in the seminal vesicles and coelom of earthworm (Annelida). Wuchereria is a human parasitic roundworm (Aschelminthes) known to cause lymphatic filariasis. Pennatula is colonial marine cnidarian. Cleiona belongs to Porifera.

Therefore, the correct answer is option A.

Presence of comb plates is characteristic feature of

zoology animal diversity - i (inverterbrate phyla) ctenophora phylum ctenophora cnidaria

  1. Porifera

  2. Cnidaria

  3. Ctenophora

  4. Platyhelminthes

  5. Annelida

Show answer
Correct Option: C
Explanation:

Ctenophores are commonly known as sea whales or comb jellies, radially symmetry, diploblastic organisms with tissue level of organization. The body bears eight external rows of ciliated comb plates which help in locomotion, hence the name Ctenophora. Cnidocytes are absent.

So the correct answer is 'Ctenophora'.

Which of the following is not a characteristic of phylum Ctenophora?

zoology animal diversity - i (inverterbrate phyla) ctenophora phylum ctenophora cnidaria

  1. They are exclusively marine, radially symmetrical animals

  2. They move by cilia, which join together to form eight median comb plates

  3. When the tentacles are present they are two in number and contain cnidoblasts

  4. Reproduction takes place only by sexual means

Show answer
Correct Option: A

Select the wrongly paired one from the following.

zoology animal diversity - i (inverterbrate phyla) ctenophora phylum ctenophora cnidaria

  1. Flats worms - Tape worm and liver fluke

  2. Sea walnuts - Hydra and Obelia

  3. Homoiothermous - Aves and mammals

  4. Incomplete digestive system - Platyhelminthes

Show answer
Correct Option: B
Explanation:

a) Tape worm and liver fluke belongs to phylum platyhelminthes, having dorsoventrally flattened body hence are flat worms.

b) Hydra and Obelia are cnidarians belongs to phylum coelenterata and exhibit two basic body forms i.e, polyp and medusa. Sea walnuts belongs to phylum ctenophora and bears comb plates.
c) Homiothermous are warm blooded animals which maintains a constant body temperature and includes aves and mammals.
d) Platyhelminthes have incomplete digestive system as they absorb nutrients from the host directly through their body surface.
So, the correct answer is option B.