Thứ sáu, 22/11/2024
IMG-LOGO

Câu hỏi:

19/07/2024 89

Mark the letter a, B, C, or D on your answer sheet to indicate the sentence that is closest meaning to each of the following questions or indicate the correct answer to each of them from 1 to 7

It is estimated that over 99 percent of all species that ever existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species’ death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For example, temperatures may change and a species may not be able to adapt. Food resources may be affected by environmental changes, which will then cause problems for a species requiring these resources. Other species may become better adapted to an environment, resulting in competition and, ultimately, in the death of a species.

The fossil record reveals that extinction has occurred throughout the history of Earth. Recent analyses have also revealed that on some occasions many species become extinct at the same time- a mass extinction. One of the best- known examples of mass extinction occurred 65 million years ago with the demise of dinosaurs and many other forms of life. Perhaps the largest mass extinction was the one that occurred 225 million years ago, when appropriately 95 percent of all species died. Mass extinction can be caused by a relatively rapid change in the environment and can be worsened by the close interrelationship of many species. If, for example, something were to happen to destroy much of the plankton in the oceans, then the oxygen content of Earth would drop, affection even organisms not living in the ocean. Such a change would probably lead to a mass extinction.

One interesting, and controversial, finding is that extinctions during the past 250 million years have tended to be more intense every 26 million years. This periodic extinction might be due to intersection of the Earth’s orbit with a cloud of comets, but this theory is purely speculative. Some researchers have also speculated that extinction may often be random. That is, certain species may be eliminated and others may survive for no particular reason. A species’ survival may have nothing to do with its ability to adapt. If so, some of evolutionary history may reflect a sequence of essentially random events.

According to paragraph 2, evidence from fossil suggests that

A. extinction of species has occurred from time to time throughout Earth’s history

Đáp án chính xác

B. dinosaurs became extinct much earlier than scientists originally believed

C. extinctions on Earth have generally been massive

D. there has been only one mass extinction in Earth’s history

Trả lời:

verified Giải bởi Vietjack

Đáp án A

Theo đoạn 2, bằng chứng từ hóa thạch chỉ ra rằng:

A. Sự tuyệt chủng của các loài đã xảy ra liên tục trong suốt tiến trình lịch sử Trái Đất.

B. Khủng long đã tuyệt chủng sớm hơn nhiều so với các nhà khoa học tin rằng.

C. Sự tuyệt chủng trên trái đất nhìn chung là mang tính hàng loạt.

D. Chỉ có duy nhất 1 lần sự tuyệt chủng hàng loạt diễn ra trong lịch sử Trái Đất.

Dẫn chứng ở câu đầu tiên đoạn 2: “The fossil record reveals that extinction has occurred throughout the history of Earth”- ( Ghi nhận về hóa thạch tiết lộ rằng sự tuyệt chủng đã xảy ra trong suốt tiến trình lịch sử Trái Đất)

Câu trả lời này có hữu ích không?

0

CÂU HỎI HOT CÙNG CHỦ ĐỀ

Câu 1:

Linda insisted that the newly- born baby ___________after her husband’s father.

Xem đáp án » 18/06/2021 4,025

Câu 2:

Mark the letter A, B, C, or D on your answer sheet to show the underlined part that needs correction.

Bacteria lived in the soil play a vital role in recycling the carbon and nitrogen needed by plants.

Xem đáp án » 18/06/2021 1,791

Câu 3:

She _______till the early hours listening to pop music.

Xem đáp án » 18/06/2021 1,667

Câu 4:

We looked everywhere but the intruder was nowhere__________.

Xem đáp án » 18/06/2021 1,638

Câu 5:

Mark the letter A, B, C, or D on your answer sheet to complete the sentence

I __________sight of the robber just before he disappeared around the corner.

Xem đáp án » 18/06/2021 1,565

Câu 6:

Mark the letter A, B, C, or D on your answer sheet to indicate the word OPPOSITE in meaning to the underlined word in the sentence.

The guests at the party last night refused to eat the raw fish

Xem đáp án » 18/06/2021 1,552

Câu 7:

My father is fond of sport. He goes to the Sport Clubs to watch________every Saturday.

Xem đáp án » 18/06/2021 1,516

Câu 8:

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest meaning to the given sentence.

It’s possible that he didn’t hear what I said

Xem đáp án » 18/06/2021 1,491

Câu 9:

The doctor gave him an injection to _________the pain.

Xem đáp án » 18/06/2021 1,289

Câu 10:

There were many large rooms with _________walls in the castle.

Xem đáp án » 18/06/2021 1,276

Câu 11:

I don’t know what we are going to ……………if I lose this job.

Xem đáp án » 18/06/2021 830

Câu 12:

Mark the letter A, B, C, or D on your answer sheet to indicate the word CLOSEST in meaning to the underlined word in the sentence.

The train departed the railway station at 8 o’clock.

Xem đáp án » 18/06/2021 799

Câu 13:

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest meaning to the given sentence.

Dr Smith is now the fifth wealthiest man in this city.

Xem đáp án » 18/06/2021 795

Câu 14:

Identify the word whose underlined part is pronounced differently from that of the others:

Xem đáp án » 18/06/2021 706

Câu 15:

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest meaning to the given sentence.

It was only when I left home that I realized how much my father meant to me.

Xem đáp án » 18/06/2021 621

Câu hỏi mới nhất

Xem thêm »
Xem thêm »