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Animal Kingdom · Question 112

AIPMT 2002MCQEasy📈 Topic in 0% papers+4−1
1

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

  1. Sponge
  2. Earthworm
  3. Cockroach
  4. Hydra

Answer

(4) Hydra

Solution

Sponges (Porifera) have the cellular level of organisation; nerve cells are absent.

⇒ Hydra (Coelenterata) has nerve cells arranged as a diffuse nerve net, but no brain (no central nervous system).

⇒ Earthworm and cockroach have a brain (cerebral/supra-oesophageal ganglia) and a ventral nerve cord.

∴ Nerve cells are present but brain is absent in Hydra.

Answer: (4)

AIPMT 2002

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2

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

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

In which of the following animals, haemocyanin pigment is found?

  1. Annelida
  2. Echinodermata
  3. Insecta
  4. Mollusca
AIPMT 2001
4

In which of the following animals post-anal tail is found?

  1. Earthworm
  2. Lower invertebrates
  3. Scorpion
  4. Snake
AIPMT 2001
5

In Hydra, waste material of food digestion and nitrogenous waste material are removed respectively from

  1. mouth and mouth
  2. body wall and body wall
  3. mouth and body wall
  4. mouth and tentacles
AIPMT 2001
6

Which of the following animals have scattered cells with cell-tissue grade organisation?

  1. Sponge
  2. Hydra
  3. Liver fluke
  4. Ascaris
AIPMT 2000
7

Similarity in Ascaris lumbricoides and Anopheles stephensi is

  1. sexual dimorphism
  2. metamerism
  3. anaerobic respiration
  4. endoparasitism.
AIPMT 2000
8

Which of the following characters is absent in all chordates?

  1. Diaphragm
  2. Coelom
  3. Pharyngeal gill clefts
  4. Dorsal nerve cord
AIPMT 2000
9

What is true for mammalia?

  1. Platypus is oviparous.
  2. Bats have feathers.
  3. Elephant is ovoviviparous.
  4. Diaphragm is absent in them.
AIPMT 2000
10

Which gland secretes odorous secretion in mammals?

  1. Bartholin's
  2. Prostate
  3. Anal gland
  4. Liver
AIPMT 2000

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