Final answer:
The first part of a scientific name denotes the genus of an organism, while the second part indicates the species.
Explanation:
The first part of the scientific name of an organism represents the genus. In the case of the polar bear, the genus is Ursus. The second part, which in this case is maritimus, represents the species. Therefore, in the scientific name Ursus maritimus, Ursus is the genus and maritimus is the species.
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