Which of the following explain the evolution of mammalia from reptilia?

Seymouria

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Prototherians

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Metatherians

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Eutherians

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Solution

The correct option is B Metatherians
The clade of Metatherians consists of egg-laying mammals. The egg-laying mammals are considered to be the connecting link between Reptilia and Mammalia. Their ovipary and the egg shells are similar to the Reptilia and the mammalian characters include the hair and the mammary glands.
A. Seymouria is the connecting link between the Reptilia and Birds.
B. Prototherians are extinct mammals.
C. Metatherians include the egg-laying mammals.
D. Eutherians are the placental mammals.
Hence, the correct answer is 'Metatherians'

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Protochordata marks the evolution of an important feature in the Animal Kingdom. Which of the following options best explains this?

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