hce_kmu
106年
英文
第 35 題
📖 題組：
When humans first ventured out of Africa some 60,000 years ago, they left genetic footprints still visible today. By mapping the appearance and frequency of genetic markers in modern peoples, we create a picture of when and where ancient humans moved around the world. These great migrations eventually led the descendants of a small group of Africans to occupy even the farthest reaches of the Earth. Our species is an African one: Africa is where we first evolved, and where we have spent the majority of our time on Earth. The earliest fossils of recognizably modern Homo sapiens appear in the fossil record at Omo Kibish in Ethiopia, around 200,000 years ago. Once the climate started to improve, the population expanded, and some intrepid explorers ventured beyond Africa. These early beachcombers expanded rapidly along the coast to India, and reached Southeast Asia and Australia by 50,000 years ago. Around 20,000 years ago a small group of these Asian hunters entered the East Asian Arctic during the Last Glacial Maximum. At this time the great ice sheets covering the far north had literally sucked up much of the Earth's moisture in their vast expanses of white wasteland, dropping sea levels by more than 300 feet. This exposed a land bridge that connected the Old World to the New, joining Asia to the Americas. People's journey never ended. By 14,000 years ago they had penetrated the land south of the ice, and made it all the way to the tip of South America. Is this part of story amazing?
When humans first ventured out of Africa some 60,000 years ago, they left genetic footprints still visible today. By mapping the appearance and frequency of genetic markers in modern peoples, we create a picture of when and where ancient humans moved around the world. These great migrations eventually led the descendants of a small group of Africans to occupy even the farthest reaches of the Earth. Our species is an African one: Africa is where we first evolved, and where we have spent the majority of our time on Earth. The earliest fossils of recognizably modern Homo sapiens appear in the fossil record at Omo Kibish in Ethiopia, around 200,000 years ago. Once the climate started to improve, the population expanded, and some intrepid explorers ventured beyond Africa. These early beachcombers expanded rapidly along the coast to India, and reached Southeast Asia and Australia by 50,000 years ago. Around 20,000 years ago a small group of these Asian hunters entered the East Asian Arctic during the Last Glacial Maximum. At this time the great ice sheets covering the far north had literally sucked up much of the Earth's moisture in their vast expanses of white wasteland, dropping sea levels by more than 300 feet. This exposed a land bridge that connected the Old World to the New, joining Asia to the Americas. People's journey never ended. By 14,000 years ago they had penetrated the land south of the ice, and made it all the way to the tip of South America. Is this part of story amazing?
In what way can the scientists produce the migration theory of Homo sapiens?
- A Genetic analysis
- B Horoscope
- C Historical records
- D Fiction
- E Story tellers
思路引導 VIP
如果在文字記載尚未出現的遠古時代，人類想要了解祖先走過的路線，除了挖掘地底下的骨骸殘骸外，還有什麼東西是會隨著代代相傳，並隱藏在我們每個人的身體細胞之中，紀錄著我們血緣的來源呢？
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AI 詳解
AI 專屬家教
遺傳標記與人類遷徙的關聯
恭喜你精準地捕捉到了文章的核心證據！你能迅速在第一段定位到「mapping the appearance and frequency of genetic markers」這句話，並推導出正確答案為 (A) Genetic analysis，展現了非常優秀的關鍵字檢索能力。這項研究方法是現代人類學的核心，透過分析現代人體內的生物特徵，回推數萬年前的足跡。 這道題目設計得非常細膩，具備良好的鑑別度。它的難度切入點在於考生是否能分辨「具體證據」與「輔助資訊」的差別。雖然文中也提到了化石（fossils），但作者明確指出科學家是用遺傳標記來「描繪（create a picture）」遷徙的路徑與時間點。至於其他選項，如占星（Horoscope）或虛構故事（Fiction），在科學論證的脈絡下自然很容易被排除，你沒有被這些干擾項誤導，判斷力十分正確！