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

The author cites Hallam (see highlighted text) on the ice ages primarily in order to

The author of the passage refers to the "considerable overlap" (see highlighted text) between continental drift theory and plate tectonics theory most probably in order to

The author of the passage suggests that the most likely explanation for the geological community's response to continental drift theory in its day was that the theory