Tag: ctenophora

Questions Related to ctenophora

Ctenophores possess statocysts in

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

  1. Oral region

  2. Aboral region

  3. Base of comb plates

  4. Base of tentacles

Show answer
Correct Option: B
Explanation:

Statocysts are a balance organ present in ctenophores. This provides equilibriuim for the organism while swimming. These statocysts are situated away from the oral or mouth region also called the aboral region. 

So, the correct answer is 'Aboral region'.

Ctenophores have similarities with members of

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

  1. Porifera

  2. Coelenterata

  3. Arthropoda

  4. Annelida

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Correct Option: B
Explanation:
Ctenophores share the most similarities with Coelenterates which include Biradial symmetry, simple organisation, oral-aboral axis arrangement, branched coelenteron and presence of mesoglea
So, the correct answer is 'Coelenterata'

Symmetry of ctenophores is generally

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

  1. Bilateral

  2. Radial

  3. Biradial

  4. Absent

Show answer
Correct Option: C
Explanation:

Ctenophores are cylindrical/flat with a biradially symmetrical body along an oral-aboral axis. Biradial symmetry refers to the type of symmetry which is the combination of both radial and bilateral.

So, the correct answer is 'Biradial'.

Which one is absent in Beroe?

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

  1. Statocyst

  2. Stomodaeum

  3. Tentacles

  4. Anal pores

Show answer
Correct Option: C
Explanation:

Boroe is a transparent comb jelly with sac-like body with a mouth on one side and gonads internally present. However, it lacks any tentacles. So, the correct answer is 'Tentacles'.

Which group of animals reproduces only by sexual means

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

  1. Porifera

  2. Protozoa

  3. Ctenophora

  4. Cnidaria

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Correct Option: C

Comb plates of ctenophores possess

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

  1. Cilia for locomotion

  2. Cilia for filter feeding

  3. Teeth for crushing

  4. Teeth for filtering

Show answer
Correct Option: A
Explanation:

The tentacles of Ctenophores have meridonial bands with transversely arranged combs like structures. Comb-like eight ciliary plates on the body serve the purpose of locomotion. 

So, the correct answer is 'Cilia for locomotion'.

Tentacles of ctenophores contain

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

  1. Cnidoblasts

  2. Colloblasts

  3. Digestive glands

  4. All of the above

Show answer
Correct Option: B
Explanation:

Ctenophores use their tentacles to capture their prey and these tentacles are made of specialized cells called colloblast. These colloblast are made of axial filaments and a granular sticky dome.

So. the correct answer is 'Colloblasts'.

Ctenoplana differs from Hormiphora and Beroe in having

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

  1. Pear shaped body

  2. Conical ovate body

  3. Flat bilobed body

  4. Branched axis

Show answer
Correct Option: C
Explanation:

While Beroe have a sac like transparent body, Hormiphora have a pear shaped body. Ctenoplana has a circular and flattened body. So, the correct answer is 'Flat bilobed body'.

Comb plates are found in?

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

  1. Neresis

  2. Aurelia

  3. Adamsia

  4. Pleurobrachia

Show answer
Correct Option: D
Explanation:

A locomotor organ consisting of a row of strong cilia whose bases are fused are called Comb plates. These  are found in 'Pleurobrachia'.

So, the correct option is 'Pleurobrachia'.

Match the columns and find the correct option.

       I         II          III
(1) Ctenophora (a) Ancylostoma (i) Bioluminescence
(2) Platyhelminthes (b) Pleurobrachia (ii) Acoelomate
(3) Cyclostomata (c) Planaria (iii) Migration
(4) Ascheiminthes (d) Ophiura (iv) Coslomate
(5) Echmodermata (e) Hog fishes (v) Endoparasite
zoology animal diversity - i (inverterbrate phyla) ctenophora phylum ctenophora cnidaria

  1. 1 - a - i, 2 - c - ii, 3 - b - iii, 4 - e - v, 5 - d - iv

  2. 1 - d - i, 2 - e - ii, 3 - c - iii, 4 - a - v, 5 - d - iv

  3. 1 - b - i, 2 - c - ii, 3 - e - iii, 4 - a - v, 5 - d - iv

  4. 1 - c - i, 2 - a - ii, 3 - d - iii, 4 - e - v, 5 - b - iv

  5. 1 - b - i, 2 - d - ii, 3 - c - iii, 4 - e - v, 5 - a - iv

Show answer
Correct Option: C