Tag: phylum ctenophora

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Questions Related to phylum ctenophora

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

Select the correct one(s) for Ctenophora -

  1. They have similarities with Cnidaria

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

  3. Bioluminescene

  4. All
Reveal answer Fill a bubble to check yourself
D Correct answer
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'
Multiple choice zoology animal diversity - i (inverterbrate phyla) ctenophora phylum ctenophora cnidaria

Comb jelles or sea walnuts are placed under -

  1. Cnidaria

  2. Ctenophora

  3. Echinodermata

  4. Annelida
Reveal answer Fill a bubble to check yourself
B Correct answer
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'
Multiple choice zoology animal diversity - i (inverterbrate phyla) ctenophora phylum ctenophora cnidaria

Find out the odd one.

  1. Adamsia

  2. Astraea

  3. Physalia

  4. Pleurobrachia
Reveal answer Fill a bubble to check yourself
D Correct answer
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'.

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

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
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.
Multiple choice zoology animal diversity - i (inverterbrate phyla) ctenophora phylum ctenophora cnidaria

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

  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

Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

Presence of comb plates is characteristic feature of

  1. Porifera

  2. Cnidaria

  3. Ctenophora

  4. Platyhelminthes

  5. Annelida
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.

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

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

  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
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Ctenophores are exclusively marine, radially symmetrical animals with comb plates for locomotion. However, they lack cnidoblasts or stinging cells, which are instead characteristic of phylum Cnidaria.

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

Select the wrongly paired one from the following.

  1. Flats worms - Tape worm and liver fluke

  2. Sea walnuts - Hydra and Obelia

  3. Homoiothermous - Aves and mammals

  4. Incomplete digestive system - Platyhelminthes
Reveal answer Fill a bubble to check yourself
B Correct answer
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.