Complete the sentence about Bengal tiger with the correct year: The validity of several tiger subspecies in continental Asia was questioned in ______.

Answer and explanation

Correct answer: A. 1999

The Bengal tiger belongs to the subspecies Panthera tigris tigris, and Bengal is its traditional type locality. In 1999 doubts were raised about the validity of several continental Asian subspecies, as tigers from different regions differ little in form and gene flow was likely during the Pleistocene.

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