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Choose the correct statement.

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

Solution & Step-by-step Explanation

- Chondrichthyes (cartilaginous fish) lack an operculum.Ornithorhynchus (Platypus) is an oviparous mammal.Crocodiles have a four-chambered heart.Cyclostomes are jawless vertebrates (Agnatha) that lack paired fins.

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Choose the correct statement.

A

All Pisces have gills covered by an operculum.

B

All mammals are viviparous.

C

All cyclostomes do not possess jaws and paired fins.

D

All reptiles have a three-chambered heart.

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