Vertebrate Classes — NEET Biology MCQs with Solutions
Free NEET Biology Vertebrate Classes MCQs with step-by-step solutions (6 questions). Part of Animal Kingdom. Practise online on Prepizo — no login needed.
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Questions with solutions
Q1 — Vertebrate Classes · easy · theory
Jawless vertebrates such as Petromyzon (lamprey) and Myxine (hagfish) belong to:
A. Chondrichthyes
B. Amphibia
C. Osteichthyes
D. Cyclostomata ✓ Correct
Solution: Cyclostomata are the most primitive, jawless (Agnatha), ectoparasitic vertebrates with a circular sucking mouth.
Q2 — Vertebrate Classes · easy · theory
Cartilaginous fishes (sharks, rays) with placoid scales belong to:
A. Osteichthyes
B. Reptilia
C. Amphibia
D. Chondrichthyes ✓ Correct
Solution: Chondrichthyes have a cartilaginous endoskeleton, ventral mouth, placoid scales, and lack an air bladder.
Q3 — Vertebrate Classes · medium · theory
A key distinguishing feature of Osteichthyes (bony fishes) from Chondrichthyes is:
A. Absence of scales
B. Placoid scales
C. Presence of an air/swim bladder and an operculum over gills ✓ Correct
D. Cartilaginous skeleton
Solution: Bony fishes have a bony skeleton, an operculum covering the gills, and typically an air bladder for buoyancy.
Q4 — Vertebrate Classes · medium · theory
Which feature FIRST appears in Reptilia and is retained in birds and mammals, distinguishing amniotes from amphibians?
A. External gills
B. The amniotic egg (extra-embryonic membranes) ✓ Correct
C. Moist skin for respiration
D. A three-chambered heart in all
Solution: Reptiles were the first amniotes — they lay shelled amniotic eggs, freeing reproduction from water.
Q5 — Vertebrate Classes · hard · theory
The heart is three-chambered in amphibians and MOST reptiles, but four-chambered in:
A. Cyclostomes
B. All reptiles
C. Crocodiles, birds and mammals ✓ Correct
D. All amphibians
Solution: Crocodilians (among reptiles), and all birds and mammals have a four-chambered heart; other reptiles/amphibians have three.
Q6 — Vertebrate Classes · hard · theory
Which combination of features correctly characterises Mammalia?
A. Mammary glands, hair, external ears (pinnae), and mostly viviparity ✓ Correct
B. Placoid scales and a two-chambered heart
C. Feathers and a beak
D. Moist skin, external fertilisation
Solution: Mammals have mammary glands, hair, pinnae, a diaphragm, heterodont teeth, and are mostly viviparous (except egg-laying monotremes).