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Animal Kingdom · Question 119

AIPMT 2000MCQEasy📈 Topic in 75% papers+4−1
1

Which of the following characters is absent in all chordates?

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

Answer

(1) Diaphragm

Solution

The question asks which character is not common to all chordates.

As per NCERT, all chordates possess a notochord, a dorsal hollow nerve cord and paired pharyngeal gill slits; they are also coelomate.

⇒ A muscular diaphragm is present only in mammals.

∴ Diaphragm is the character not found in all chordates.

Answer: (1)

AIPMT 2000

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2

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
3

Which gland secretes odorous secretion in mammals?

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

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