What characteristic defines the Class Mammalia classification for the West Siberian Laika?
Answer
Females secrete milk for nourishing the young
Membership in the Class Mammalia imposes specific biological requirements that the West Siberian Laika fulfills. While it possesses hair or fur, which is another characteristic of the class, the definitive trait that separates mammals from other vertebrate classes involves reproduction and nourishment. Specifically, females of this class must secrete milk via mammary glands to provide sustenance for their offspring. This biological mechanism is a key identifier for the Laika being placed within Mammalia, alongside its warm-blooded nature and coat presence.
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