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NTA Abhyas NEET2020BotanyAnimal KingdomPractice

Which of the following is a feature of a bony fish?

Options

  1. APlacoid scales present
  2. BGills with operculum
  3. CHabitant of marine water only
  4. DAir bladder absent

Correct answer

B. Gills with operculum

Step-by-step solution

Feature Class Chondrichthyes Class Osteicthyes Common name Cartilagenous fishes Bony fishes Endoskeleton Cartilaginous Bony Habitat Mostly marine Both marine and fresh water Gills and gill-cover Usually 5–7 pairs of gills without operculum (gill cover) 4 pairs of gills covered by operculum Types of scales Placoid scales present Usually cycloid or ctenoid scales present Air or swim bladder Absent Present

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