Choose the correct statement.

Correct answer: B. All cyclostomes do not possess jaws and paired fins

  • A. All mammals are viviparous
  • B. All cyclostomes do not possess jaws and paired fins
  • C. All reptiles have a three chambered heart
  • D. All pisces have gills covered by an operculum

Explanation

All cyclostomes lack true jaws and paired fins. Cyclostomes are jawless fish characterized by their round, sucker-like mouths for feeding and a single median fin for propulsion. Ornithorhynchus and Tachyglossus are oviparous mammals. Crocodile is a reptile which possesses four chambered heart. In cartilaginous fish (except Chimaera) gills are not covered by an operculum.

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About Kingdom Animalia

Animals are multicellular, heterotrophic eukaryotes whose cells lack cell walls and chloroplasts, with specialised tissues in most groups. Coverage includes body symmetry, tissue layers, coelom, segmentation and levels of organisation, plus major phyla such as Porifera, Cnidaria, Platyhelminthes, Annelida, Arthropoda, Mollusca and Chordata.

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