Tag: zoology

Questions Related to zoology

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

Show answer
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

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'.