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Animal Kingdom · Question 103

AIPMT 2005MCQEasy📈 Topic in 0% papers+4−1
1

In contrast to annelids the platyhelminthes show

  1. absence of body cavity
  2. bilateral symmetry
  3. radial symmetry
  4. presence of pseudocoel.

Answer

(1) absence of body cavity

Solution

As per NCERT, the animals in which the body cavity is absent are called acoelomates, e.g. platyhelminthes; annelids are coelomates (true coelom lined by mesoderm).

⇒ Both groups are bilaterally symmetrical, so (2) is common to both and (3) fits neither.

⇒ Pseudocoel is seen in aschelminthes, not in platyhelminthes.

∴ In contrast to annelids, platyhelminthes show absence of body cavity.

Answer: (1)

AIPMT 2005

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2

From the following statements select the wrong one

  1. Prawn has two pairs of antennae.
  2. Nematocysts are characteristic of the phylum Cnidaria.
  3. Millipedes have two pairs of appendages in each segment of the body.
  4. Animals belonging to phylum Porifera are marine and fresh water.
AIPMT 2005
3

Which one of the following characters is not typical of the class Mammalia?

  1. Thecodont dentition
  2. Alveolar lungs
  3. Ten pairs of cranial nerves
  4. Seven cervical vertebrae
AIPMT 2005
4

In Arthropoda, head and thorax are often fused to form cephalothorax, but in which one of the following classes, is the body divided into head, thorax and abdomen?

  1. Insecta
  2. Myriapoda
  3. Crustacea
  4. Arachnida and Crustacea
AIPMT 2004
5

The animals with bilateral symmetry in young stage, and radial pentamerous symmetry in the adult stage, belong to the Phylum

  1. Annelida
  2. Mollusca
  3. Cnidaria
  4. Echinodermata
AIPMT 2004
6

One of the following is a very unique feature of the mammalian body

  1. homeothermy
  2. presence of diaphragm
  3. four chambered heart
  4. rib cage
AIPMT 2004
7

Sycon belongs to a group of animals, which are best described as

  1. unicellular or acellular
  2. multicellular without any tissue organization
  3. multicellular with a gastrovascular system
  4. multicellular having tissue organization, but no body cavity.
AIPMT 2003
8

During the life-cycle, Fasciola hepatica (liver fluke) infects its intermediate host and primary host at the following larval stages respectively

  1. redia and miracidium
  2. cercaria and redia
  3. metacercaria and cercaria
  4. miracidium and metacercaria
AIPMT 2003
9

Which one of the following is a matching pair of an animal and a certain phenomenon it exhibits?

  1. Pheretima – Sexual dimorphism
  2. Musca – Complete metamorphosis
  3. Chameleon – Mimicry
  4. Taenia – Polymorphism
AIPMT 2003
10

In which of the following animals nerve cell is present but brain is absent?

  1. Sponge
  2. Earthworm
  3. Cockroach
  4. Hydra
AIPMT 2002
11

In which of the following, notochord is present in embryonic stage?

  1. All chordates
  2. Some chordates
  3. Vertebrates
  4. Non-chordates
AIPMT 2002

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