The author mentions which of the following as evidence for the view that cub-carrying behavior among sloth bears functions primarily as a defense from predation?
Which of the following is mentioned in the passage as a way in which brown bears and sloth bears are similar?
Which of the following, if true, would most weaken the author's argument in the highlighted text?
The author mentions rhinoceroses and elephants (see highlighted text) primarily in order to
Which of the following does the author mention as support for the view that environmental disturbances caused by human activity could increase straying rates?
The author's argument that increased straying can "lower the overall fitness of subsequent generations" (see highlighted text) is based on which of the following assumptions?
According to the passage, human activity has had which of the following effects on salmon populations?
It can be inferred from the passage that the occasional failure of some salmon to return to their natal streams in order to spawn provides a mechanism by which
The primary purpose of the passage is to
The author of the passage discusses the "essential presumptions" (see highlighted text) of The Origin of Continents and Oceans most in order to