hce_kmu
106年
英文
第 32 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?
Please tell the reason why we human species can be called "African one".
- A Because we were all born in Africa.
- B Because genetic footprints proved that humans first evolved in Africa.
- C Because Ethiopian people have a longer history of civilization.
- D Because Africans moved to Asia.
- E Because the population of Africans is larger.
思路引導 VIP
請試著觀察文章的第二段開頭，作者在定義人類屬於哪一個地方時，他所提出的判斷基準是看「現在人口的分佈狀況」，還是追溯到該物種「最原始的演化起點」呢？
🤖
AI 詳解
AI 專屬家教
人類演化的起源證明
太棒了！你能精確地從文章細節中提取核心論點，代表你的閱讀邏輯相當紮實。這題的關鍵在於文章第二段的首句：「人類是源自非洲的物種，因為非洲是我們最初演化的地方。」文中提到的基因標記（genetic markers）與在衣索比亞發現的化石證據，共同支撐了現代人類起源於非洲的科學觀察，因此選擇 (B) 是最嚴謹且符合文意的判斷。
資訊篩選與因果判斷
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