Which of the following is a connecting link between mammals and reptiles?
A
Peripatus
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B
Balanoglossus
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C
Ornithorhyncus
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D
Archaeopteryx
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Solution
The correct option is COrnithorhyncus Ornithorhyncus is a primitive mammal. It lays egg like reptiles but the young ones are nursed on milk produced in female animals body. Peripatus is a connecting link between arthropods and worms. Archaeopteryx is a connecting link between birds and reptiles. Balanoglossus are marine burrowing worms previously classified as Chordates but are now kept in a separate phylum Hemichordata.