Câu hỏi:
03/04/2020 626Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 36 to 42.
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.
The author mentions the extinction of the dinosaurs in paragraph 2 to emphasize that ______.
Đáp án chính xác
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).
Quảng cáo
Trả lời:
Giải bởi Vietjack
Đáp án A
Tác giả đề cập đến sự tuyệt chủng của những con khủng long trong đoạn 2 để nhấn mạnh
cái đó:
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.
A. không phải mọi sự tuyệt chủng hàng loạt đều do hoạt động của con người gây ra
B. hành động của con người không thể ngăn chặn quá trình tuyệt chủng không thể đảo ngược của một loài
C. Khí hậu Trái Đất đã thay đổi đáng kể kể từ khi loài khủng long bị tuyệt chủng
D. nguyên nhân của sự tuyệt chủng của loài khủng long là không rõ
Nhà sách VIETJACK:
CÂU HỎI HOT CÙNG CHỦ ĐỀ
Câu 1:
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
People who don’t get ________ their coworkers sometimes don’t last long at their jobs.
Xem đáp án »
03/04/2020
21,643
Câu 2:
Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.
“Can I sit beside you, Jean?” Tom asked.
Xem đáp án »
03/04/2020
21,555
Câu 3:
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
Nine of every ten people in the world _____ in the country in which they were born.
Xem đáp án »
03/04/2020
17,793
Câu 4:
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
Captain Scott’s ________ to the South Pole was marked by disappointment and tragedy.
Xem đáp án »
03/04/2020
15,822
Câu 5:
Mark the letter A, B, C or D on your answer sheet to indicate the most suitable response to complete each of the following exchanges
“Do you mind if I switch the light off?” - “________.”
Xem đáp án »
03/04/2020
14,907
Câu 6:
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
My new neighbor has two children, _______ are very lovely.
Xem đáp án »
03/04/2020
13,732
Câu 7:
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
Those interested in the post of Assistant manager are requested to apply ________.
Xem đáp án »
03/04/2020
13,382
về câu hỏi!