(Choice B) It states a generalization that is exemplified by the discussion of the beavers and Nothofagus trees.
This sentence sets up the idea that the beaver can form new relationships with different tree species, which is then demonstrated by the example of their interaction with the Nothofagus trees in Patagonia.
The beaver is a keystone species in North America, where it evolved in symbiosis with the aspen tree. Beavers were introduced to Patagonia (a region encompassing the southernmost tip of South America) in 1946, where they encountered an abundance of Nothofagus trees, a type of southern beech. From this, it was discovered that the evolutionary symbiosis that the beaver has with the aspen tree does not preclude it from forming new relationships with different tree species. Within a few years, the beavers had changed the ecosystem in Patagonia by utilizing Nothofagus trees much in the same way they interact with Aspens in North America.
Which choice best describes the function of the third sentence in the overall structure of the text?
Choose 1 answer:
Choose 1 answer:
(Choice A) It contrasts the beaver’s relationship with the aspen tree to the beaver’s relationship with the Nothofagus tree.
A
It contrasts the beaver’s relationship with the aspen tree to the beaver’s relationship with the Nothofagus tree.
(Choice B) It states a generalization that is exemplified by the discussion of the beavers and Nothofagus trees.
B
It states a generalization that is exemplified by the discussion of the beavers and Nothofagus trees.
(Choice C) It describes how the beaver was first introduced to Patagonia.
C
It describes how the beaver was first introduced to Patagonia.
(Choice D) It provides context that clarifies why the beaver evolved to form symbiotic relationships with different tree species.
D
It provides context that clarifies why the beaver evolved to form symbiotic relationships with different tree species.
1 answer