Should Cetaceans be considered mammals or fish? and why

Mammal

Explanation:

A mammal is any any animal that is warm-blooded, gets milk from its mother, and is born alive, etc. Therefore a Cetacean should be considered a mammal.

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the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.