托福考试综合写作范文：微器官功能

>>托福写作考试范文：托福综合写作范文：微器官功能

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托福综合写作范文Sample answer:

The listening refutes the three functions raised in the reading to explain the existence of the eye in microbes.

First, the reading holds that the eye is used for following preys. Since the microbes’ preys are usually transparent, which means their movement will cause the oscillation of light, the eye can enable the microbes to detect those and follow the prey.. However, the listening points out that there are researches proving that other closely related microbes, which have no eyes, can also follow their prey successfully. Therefore, their eyes must be for other purposes.

Second, the reading believes that the eye is used to sense the sunlight. One part of the energy source of microbes is the sun, so with the eye sensing the intensity of sunlight they can find a better place to absorb the solar energy. On the contrary, in the listening, the eye can not sense sunlight, otherwise, it will not confirm with the law of evolution. Scientists find that they are becoming less and less dependent on sunlight for energy. Compared with their ancestors, the sea-dwelling microorganism is with a much more complex eye.

Third, the reading suggests that the eye has aiming function which help microbes target the prey more accurately when they send forth something like spear to stab. However, the listening refutes that researchers find that the eye couldn’t focus quite well and can not form clear image, which means they are not able to have better accuracy at their preys when stabbing them.

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