Tag: cnidaria

Quizzes (3) Questions (48)

Questions Related to cnidaria

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

Ctenophores possess statocysts in

  1. Oral region

  2. Aboral region

  3. Base of comb plates

  4. Base of tentacles
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.

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

Ctenophores have similarities with members of

  1. Porifera

  2. Coelenterata

  3. Arthropoda

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

Symmetry of ctenophores is generally

  1. Bilateral

  2. Radial

  3. Biradial

  4. Absent
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.

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

Comb plates of ctenophores possess

  1. Cilia for locomotion

  2. Cilia for filter feeding

  3. Teeth for crushing

  4. Teeth for filtering
Reveal answer Fill a bubble to check yourself
A Correct answer
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'.

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

Tentacles of ctenophores contain

  1. Cnidoblasts

  2. Colloblasts

  3. Digestive glands

  4. All of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.

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

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

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

The correct matching is: Ctenophora-Pleurobrachia-bioluminescence, Platyhelminthes-Planaria-acoelomate, Cyclostomata-Hog fishes-migration, Aschelminthes-Ancylostoma-endoparasite, Echinodermata-Ophiura-coelomate. This follows taxonomic classification and characteristic traits.