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托福mock test 7阅读 Prehistoric Diet 题目解析

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Prehistoric Diet
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Early human diets have long intrigued researchers. Recently, scientists have discovered surprising evidence that prehistoric humans consumed a diverse range of foods. This evidence comes from the analysis of ancient teeth and bones, which reveal traces of plant and animal matter. While it was once believed that early humans predominantly ate meat, new findings suggest they also consumed significant amounts of plant-based foods. These included tubers, nuts, seeds, and fruits.

The consumption of seafood is another intriguing aspect of prehistoric diets. Coastal communities likely relied on fish and shellfish, providing essential omega-3 fatty acids. These nutrients are crucial for brain development, indicating that seafood may have played a significant role in the cognitive evolution of humans. Moreover, the variety in their diet helped early humans adapt to different environments. Communities in arid regions relied more on drought-resistant plants for a reliable food source, while those in fertile areas had access to a wider range of dietary options.

Understanding humans’ prehistoric diet also sheds light on social structures. Sharing food resources might have fostered cooperation and social bonds within communities. This cooperative behavior was essential for survival, enabling groups to hunt, gather, and share food effectively, thus enhancing their chances of thriving in challenging environments.

1.What evidence suggests that prehistoric humans consumed plant-based foods?

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正确答案:A

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题干题型分析:考查史前人类食用植物性食物的证据来源。 定位理解:定位第一段 “This evidence comes from the analysis of ancient teeth and bones, which reveal traces of plant and animal matter”,明确证据的获取途径。 选项辨析: B(古代烹饪工具的发现)、C(现代狩猎采集社会的研究)、D(沿海群落的观察)均未提及; A(对牙齿和骨骼的分析)与原文表述完全一致,正确。

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