1. Tardigrade
  2. Question
  3. Biology
  4. Which of the following represents the correct com- bination without any exception ? Characteristics Class (a) Sucking and circular mouth; jaws absent, integument without scales; paired appendages Cyclostomata (b) Body covered with feathers; skin moist and glandular, fore-limbs form wings; lungs with air sacs Aves (c) Mammary gland; hair on body; pinnae; two pairs of limbs Mammalia (d) Mouth ventral; gills without operculum; skin with placoid scales; persistent notochord Chondrichthyes

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Q. Which of the following represents the correct com- bination without any exception ?
Characteristics Class
(a) Sucking and circular mouth; jaws absent, integument without scales; paired appendages Cyclostomata
(b) Body covered with feathers; skin moist and glandular, fore-limbs form wings; lungs with air sacs Aves
(c) Mammary gland; hair on body; pinnae; two pairs of limbs Mammalia
(d) Mouth ventral; gills without operculum; skin with placoid scales; persistent notochord Chondrichthyes

AIPMTAIPMT 2015Animal Kingdom

Solution:

Cyclostomes do not have paired appendages. Skin in Aves is neither moist nor glandular. Only preen gland is present at the base of tail. Chondrichthyes members have gills without operculum, except Chimaera. Prototherian mammals do not have ear pinnae and aquatic mammals lack hindlimbs (like whales and dolphins).