▶ Your Answer :
In the given set of information, both
the reading passage and the lecture deal with cane toads, which is made to
control pests. The lecturer casts doubt on the author’s assertion on several
ways to control the proliferations of cane toads, by presenting three
compelling counterarguments.
First of all, according to the reading
passage, building fences will prevent the cane toads from spreading. However,
the lecturer refutes the passage by stating that the author’s claim is
disputable. To be specific, cane toads can still be spread by water ways because
rivers and streams cannot be fenced. Therefore, building fences would be
ineffective.
Next, the author claims that getting help
from educated local volunteers can be another solution. Regarding this point, the
lecturer indicates that the idea is not convincing. Since average people are
not biologists, they cannot distinguish native frog offspring and cane toads. That
is, native frog populations will probably decline, resulting an unfortunate
consequence.
Lastly, the speaker also disagrees with
the reading’s final point on the new kind of virus, BIV, to eradicate cane toads.
He argues that it could be an ecological disaster if the virus spreads to populations
in regions where the cane toads are native. Thus, the virus will not decrease
in the cane toad population.
All in all, the lecturer concludes that
the three theories posited from the passage all have drawbacks.
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