Looking for classes? Ksquare Career Institute, Bengaluru →
Classification of chordates
Appears in
Concepts tested here
- Characters of vertebrate classes
- Chondrichthyes
All Questions
2015 AIPMT-I 1 question
-
Which of the following represents the correct combination without any exception?Chondrichthyes: ventral mouth, gills without operculum, placoid scales and persistent notochord — correct without exception.
Mammalia: whales lack pinnae.
Cyclostomata: paired appendages are absent.
Aves: skin is dry and without glands (except the oil gland).
2011 AIPMT-PRE 1 question
-
Which one of the following groups of animals is correctly matched with its one characteristic feature without even a single exception?All members of class Chondrichthyes (sharks, rays, skates) have a cartilaginous endoskeleton; there is no exception.
Mammalia: the egg-laying mammals (monotremes such as the platypus, $Ornithorhynchus$) do not give birth to young ones.
Reptilia: crocodiles have a four-chambered heart.
Chordata: cyclostomes (lampreys and hagfishes) are jawless (Agnatha), and protochordates also lack jaws.
Hence the group matched without exception is Chondrichthyes: possess cartilaginous endoskeleton.