▶ Your Answer : The lecture is mainly talking about three hypothesis that zebras have stripes, while the reading passage casts doubt on each theories.
First of all, the professor claims that, zebra stripes doesn't prevent their predators from detecting them. He says that new study in 2016 proved that zebra's predator,especially lions, detect zebras as clear as non-striped animals, and even at the closer location, they usually use their sense of smell to detect preys. This contradicts the reading passage's assertment that, zebra stripe allows them to hide behind grasses and hinder predators from finding them.
Secondly, the lecturer asserts that, zebra stripes cannot help them avoiding from bitting flies. He argues that, many bitting insects, such as mosquitos bite their prey during the night, and they use their sense of smell than using their sight while finding their prey. This rebuffs the reading passage's arguement that, zebra stripes, the combination of light and dark lines can be really confusing to bitting flies, and actually the research proved that, striped horse model got the least number of bites.
Finally, the speaker mentions that, zebras may not use their stripes for regulating their temperature. Contrary to the popular example, elephant ears, which have lots of evidence to prove their role to adjust the temperature, the stripes of zebra have any conclusive proofs or researches. This rebutes the reading's argument that zebra's dark and light stripes absorbs and repels light, a current of air may be created and facilitates zebra's body temperature to decrease. |