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Assertion: The categorization of the duck-billed platypus and spiny anteater as mammals despite being egg-laying animals can be explained by the fact that they possess 7 cervical vertebrae and 12 pairs of cranial nerves.
Reason: The presence of 7 cervical vertebrae and 12 pairs of cranial nerves is a characteristic shared by mammals, and this common anatomical feature allows the duck-billed platypus and spiny anteater to be classified within the mammalian group, even though they lay eggs.
Both Assertion and Reason are true and Reason is the correct explanation of the assertion
Both Assertion and Reason are true but Reason is not the correct explanation of the assertion
Assertion is true but the reason is false
Both assertion and reason are false.
Answers (1)
The duck-billed platypus and spiny anteater are classified as mammals despite laying eggs. They possess typical mammalian traits such as mammary glands, milk production, and hair or fur. While the reason given - the presence of 7 cervical vertebrae and 12 pairs of cranial nerves - is shared by mammals, it is not the sole reason for their classification. The categorization is based on a combination of various characteristics, including reproductive strategies, organ structure, and genetic analysis. The duck-billed platypus and spiny anteater are classified as mammals due to a mix of mammalian traits and unique features found in monotremes, their specific group. Therefore, while both the assertion and reason are true, the reason alone does not fully explain their classification as mammals. Hence, the correct answer is option 2.
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