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Animal Kingdom · Question 76

AIPMT 2011 (Mains)MCQMedium📈 Topic in 75% papers+4−1
1

The figures (A – D) show four animals. Select the correct option with respect to a common characteristic of two of these animals. [Figure]

  1. (A) and (B) have cnidoblasts for self-defence
  2. (A) and (D) respire mainly through body wall
  3. (C) and (D) have a true coelom
  4. (B) and (C) show radial symmetry

Answer

(3) (C) and (D) have a true coelom

Solution

(A) is a tapeworm ( Taenia, Platyhelminthes), (B) is a jellyfish ( Aurelia, Coelenterata), (C) is Octopus (Mollusca) and (D) is a scorpion (Arthropoda).

Cnidoblasts are found only in coelenterates, i.e. only in (B).

Scorpion respires by book lungs, not through the body wall.

Aurelia is radially symmetrical, but Octopus is bilaterally symmetrical.

As per NCERT, annelids, molluscs, arthropods, echinoderms, hemichordates and chordates are coelomates ⇒ Octopus (C) and scorpion (D) have a true coelom.

Answer: (3)

AIPMT 2011 (Mains)

Keep practising — Animal Kingdom

2

What will you look for to identify the sex of the following?

  1. Female Ascaris – sharply curved posterior end
  2. Male frog – a copulatory pad on the first digit of the hind limb
  3. Female cockroach – anal cerci
  4. Male shark – claspers borne on pelvic fins
AIPMT 2011 (Prelims)
3

Which one of the following groups of animals is correctly matched with its characteristic feature without any exception?

  1. Reptilia : possess 3-chambered heart with an incompletely divided ventricle
  2. Chordata : possess a mouth with an upper and a lower jaw
  3. Chondrichthyes : possess cartilaginous endoskeleton
  4. Mammalia : give birth to young ones
AIPMT 2011 (Prelims)
4

In which one of the following the genus name, its two characters and its class/phylum are correctly matched?

  1. array|l|l|l| Genus name & Two characters & Class/Phylum \ Ascaris & (i) Body segmented & Annelida \ & (ii) Males and females distinct & \ array
  2. array|l|l|l| Genus name & Two characters & Class/Phylum \ Salamandra & (i) A tympanum represents ear & Amphibia \ & (ii) Fertilization is external & \ array
  3. array|l|l|l| Genus name & Two characters & Class/Phylum \ Pteropus & (i) Skin possesses hair & Mammalia \ & (ii) Oviparous & \ array
  4. array|l|l|l| Genus name & Two characters & Class/Phylum \ Aurelia & (i) Cnidoblasts & Coelenterata \ & (ii) Organ level of organization & \ array
AIPMT 2011 (Prelims)
5

Crocodile and penguin are similar to whale and dogfish in which one of the following features?

  1. Possess a solid single stranded central nervous system
  2. Lay eggs and guard them till they hatch
  3. Possess bony skeleton
  4. Have gill slits at some stage
AIPMT 2010 (Mains)
6

One example of animals having a single opening to the outside that serves both as mouth as well as anus is

  1. Octopus
  2. Asterias
  3. Ascidia
  4. Fasciola
AIPMT 2010 (Prelims)
7

Which one of the following statements about all the four of Spongilla, leech, dolphin and penguin is correct?

  1. Penguin is homoiothermic while the remaining three are poikilothermic.
  2. Leech is a fresh water form while all others are marine.
  3. Spongilla has special collared cells called choanocytes, not found in the remaining three.
  4. All are bilaterally symmetrical.
AIPMT 2010 (Prelims)
8

Which one of the following kinds of animals are triploblastic?

  1. Flatworms
  2. Sponges
  3. Ctenophores
  4. Corals
AIPMT 2010 (Prelims)
9

Which one of the following statements about certain given animals is correct?

  1. Roundworms (Aschelminthes) are pseudocoelomates
  2. Molluscs are acoelomates
  3. Insects are pseudocoelomates
  4. Flatworms (Platyhelminthes) are coelomates
AIPMT 2010 (Prelims)
10

Which one of the following groups of animals is bilaterally symmetrical and triploblastic?

  1. Aschelminthes (round worms)
  2. Ctenophores
  3. Sponges
  4. Coelenterates (cnidarians)
AIPMT 2009
11

Which one of the following pairs of animals comprises 'jawless fishes'?

  1. Mackerels and rohu
  2. Lampreys and hagfishes
  3. Guppies and hagfishes
  4. Lampreys and eels
AIPMT 2009

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