Câu hỏi:
27/07/2023 668
Biological diversity has become widely recognized as a critical conservation issue only in the past two decades. The rapid destruction of the tropical rain forests, which are the ecosystems with the highest known species diversity on Earth, has awakened people to the importance and fragility of biological diversity. The high rate of species extinctions in these environments is jolting, but it is important to recognize the significance of biological diversity in all ecosystems. As the human population continues to expand, it will negatively affect one after another of Earth’s ecosystems. In terrestrial ecosystems and in fringe marine ecosystems (such as wetlands), the most common problem is habitat destruction. In most situations, the result is irreversible. Now humans are beginning to destroy marine ecosystems through other types of activities, such as disposal and runoff of poisonous waste; in less than two centuries, by significantly reducing the variety of species on Earth, they have irrevocably redirected the course of evolution.
Certainly, there have been periods in Earth’s history when mass extinctions have occurred. The extinction of the dinosaurs was caused by some physical event, either climatic or cosmic. There have also been less dramatic extinctions, as when natural competition between species reached an extreme conclusion. Only 0.01 percent of the species that have lived on Earth have survived to the present, and it was largely chance that determined which species survived and which died out.
However, nothing has ever equaled the magnitude and speed with which the human species is altering the physical and chemical world and demolishing the environment. In fact, there is wide agreement that it is the rate of change humans are inflicting, even more than the changes themselves, that will lead to biological devastation. Life on Earth has continually been in flux as slow physical and chemical changes have occurred on Earth, but life needs time to adapt-time for migration and genetic adaptation within existing species and time for the proliferation of new genetic material and new species that may be able to survive in new environments.
What does the passage mainly discuss?
Biological diversity has become widely recognized as a critical conservation issue only in the past two decades. The rapid destruction of the tropical rain forests, which are the ecosystems with the highest known species diversity on Earth, has awakened people to the importance and fragility of biological diversity. The high rate of species extinctions in these environments is jolting, but it is important to recognize the significance of biological diversity in all ecosystems. As the human population continues to expand, it will negatively affect one after another of Earth’s ecosystems. In terrestrial ecosystems and in fringe marine ecosystems (such as wetlands), the most common problem is habitat destruction. In most situations, the result is irreversible. Now humans are beginning to destroy marine ecosystems through other types of activities, such as disposal and runoff of poisonous waste; in less than two centuries, by significantly reducing the variety of species on Earth, they have irrevocably redirected the course of evolution.
Certainly, there have been periods in Earth’s history when mass extinctions have occurred. The extinction of the dinosaurs was caused by some physical event, either climatic or cosmic. There have also been less dramatic extinctions, as when natural competition between species reached an extreme conclusion. Only 0.01 percent of the species that have lived on Earth have survived to the present, and it was largely chance that determined which species survived and which died out.
However, nothing has ever equaled the magnitude and speed with which the human species is altering the physical and chemical world and demolishing the environment. In fact, there is wide agreement that it is the rate of change humans are inflicting, even more than the changes themselves, that will lead to biological devastation. Life on Earth has continually been in flux as slow physical and chemical changes have occurred on Earth, but life needs time to adapt-time for migration and genetic adaptation within existing species and time for the proliferation of new genetic material and new species that may be able to survive in new environments.
What does the passage mainly discuss?
Đáp án chính xác
Câu hỏi trong đề:
Đề kiểm tra học kì 2 Tiếng anh 12 năm 2023 có đáp án !!
Sách mới 2k7: Tổng ôn Toán, Lí, Hóa, Văn, Sử, Địa…. kỳ thi tốt nghiệp THPT Quốc gia 2025, đánh giá năng lực (chỉ từ 110k).
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Trả lời:
Giải bởi Vietjack
Đáp án D
Câu hỏi cùng đoạn
Câu 2:
The word “jolting” is closest in meaning to______.
The word “jolting” is closest in meaning to______.
Đáp án chính xác
Lời giải của GV VietJack
Đáp án C
Câu 3:
The author mentions all of the following as examples of the effect of humans on the world’s ecosystems EXCEPT______.
The author mentions all of the following as examples of the effect of humans on the world’s ecosystems EXCEPT______.
Đáp án chính xác
Lời giải của GV VietJack
Đáp án C
Câu 4:
The author mentions the extinction of the dinosaurs in paragraph 2 to emphasize that ______.
The author mentions the extinction of the dinosaurs in paragraph 2 to emphasize that ______.
Đáp án chính xác
Lời giải của GV VietJack
Đáp án A
Câu 5:
According to the passage, natural evolutionary change is different from changes caused by humans in that changes caused by humans _______.
According to the passage, natural evolutionary change is different from changes caused by humans in that changes caused by humans _______.
Đáp án chính xác
Lời giải của GV VietJack
Đáp án B
Câu 6:
The word “they” in paragraph 1 refer to _________.
The word “they” in paragraph 1 refer to _________.
Đáp án chính xác
Lời giải của GV VietJack
Đáp án A
Câu 7:
With which of the following statements would the author be most likely to agree?
With which of the following statements would the author be most likely to agree?
Đáp án chính xác
Lời giải của GV VietJack
Đáp án D
Nhà sách VIETJACK:
CÂU HỎI HOT CÙNG CHỦ ĐỀ
Câu 2:
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blank 26.
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blank 26.
Xem đáp án »
27/07/2023
699
Câu 4:
Mark the letter A, B, C, or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following question.
Mark the letter A, B, C, or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following question.
Xem đáp án »
27/07/2023
505
Câu 5:
Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following question.
Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following question.
Xem đáp án »
27/07/2023
464
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