▶ Your Answer : The lecturer argues that cows did not
evolve to detect earth’s magnetic field. This contradicts the reading passage’s
claim that cows are able to recognize the field since they point to north or
south while grazing.First, the speaker contends that fish and
birds who utilize earth’s magnetic field make advantage of their skill while
migrating along huge distances. However, in cows, it is found only while eating
or sleeping, which seems reasonless. This strongly refutes the reading passage
that as many animals already have the ability to use magnetic field, it is not
odd to see it in cows.
Second, according to the lecturer, the
picture taken by the satellite was unclear. It was hard to distinguish cows
from other animals, and the behavior was seen as alone, not in a heir. Also, it
is possible that it was because of the slope. This rebuts the reading that
satellite photo disclosed that cows are in the same direction at approximately
same time of the day.
Third, the professor states the argument
that only cows near electrical power lines head randomly is not persuasive. Moreover,
this was supported by only one research team, other two teams failing to do so.
This offers a counterpoint to the reading that the sign that cows are
distracted by electric power lines proves the fact that cows detect magnetic
field. |