Thứ sáu, 17/05/2024
IMG-LOGO

Câu hỏi:

18/06/2021 111

Read 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 43 to 50.

 

          Life originated in the early seas less than a billion years after the Earth was formed. Yet another three billion years were to pass before the first plants and animals appeared on the continents. Life’s transition from the sea to the land was perhaps as much of an evolutionary challenge as was the genesis of life.
          What forms of life were able to make such a drastic change in lifestyle? The traditional view of the first terrestrial organisms is based on mega fossils-relatively large specimens of essentially whole plants and animals. Vascular plants, related to modern seed plants and ferns, left the first comprehensive mega fossil record. Because of this, it has been commonly assumed that the sequence of terrestrialization reflected the evolution of modern terrestrial ecosystems. In this view, primitive vascular plants first colonized the margins of continental waters, followed by animals that feed on the plants, and lastly by animals that preyed on the plant-eaters. Moreover, the mega fossils suggest that terrestrial life appeared and diversified explosively near the boundary between the Silurian and the Devonian periods, a little more than 400 million years ago.
          Recently, however, paleontologists have been taking a closer look at the sediments below this Silurian-Devonian geological boundary. It turns out that some fossils can be extracted from these sediments by putting the rocks in an acid bath. The technique has uncovered new evidence form sediments that were deposited near the shores of the ancient oceans- plant microfossils and microscopic pieces of small animals. In many instances the specimens are less than one-tenth of a millimeter in diameter. Although they were entombed in the rocks for hundreds of millions of years, many of them fossils consist of the organic remains of the organism.
          These newly discovered fossils have not only revealed the existence of previously unknown organisms, but have also pushed back these dates for the invasion of land by multicellular organisms. Our views about the nature of the early plant and animal communities are now being revised. And with those revisions come new speculations about the first terrestrial life-forms

Which of the following resulted from the discovery of microscopic fossils?

A. Which of the following resulted from the discovery of microscopic fossils?

Đáp án chính xác

B. Old techniques for analyzing fossils were found to have new uses

C. The origins of primitive sea life were explained

D. Assumptions about the locations of ancient seas were changed

Trả lời:

verified Giải bởi Vietjack

Đáp án A

Điều gì có thể suy được từ việc phát hiện ra vi hóa thạch ?
A. Ước tính thời gian cho sự xuất hiện đầu tiên của mặt đất sống hình thức đã được thay đổi.
B. Kĩ thuật cũ để phân tích hóa thạch được cho là có những cách dùng mới
C. Giải thích được nguồn goccs ra đời của sinh thể biển nguyên thủy
D. Giả định về vị trí của vùng biển cổ đại đã được thay đổi.
Dẫn chứng:” These newly discovered fossils have not only revealed the existence of previously unknown organisms, but have also pushed back these dates for the invasion of land by multicellular organisms.”

Câu trả lời này có hữu ích không?

0

CÂU HỎI HOT CÙNG CHỦ ĐỀ

Câu 1:

Students who study far from home often have problems with _______.

Xem đáp án » 18/06/2021 1,899

Câu 2:

She has read ______ interesting book

Xem đáp án » 18/06/2021 1,695

Câu 3:

Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions

Your experience with oil well fires will be invaluable to the company in case of trouble

Xem đáp án » 18/06/2021 1,251

Câu 4:

He was believed ______ 3 years ago

Xem đáp án » 18/06/2021 1,056

Câu 5:

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

The International Union for Conservation of Nature Red List is a comprehensive catalogue of the conservation status of species

Xem đáp án » 18/06/2021 799

Câu 6:

Murder is a serious crime and one rarely ______________ with it

Xem đáp án » 18/06/2021 745

Câu 7:

Some days of rest may help to _______ the pressure of work

Xem đáp án » 18/06/2021 670

Câu 8:

She used to be very thin but she has __________ a bit now

Xem đáp án » 18/06/2021 642

Câu 9:

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 questions.

Xem đáp án » 18/06/2021 521

Câu 10:

Education in England puts ______ force for children from 9 to 16 years old.

Xem đáp án » 18/06/2021 499

Câu 11:

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 questions

Xem đáp án » 18/06/2021 473

Câu 12:

Tommy wanted to know ______ 

Xem đáp án » 18/06/2021 468

Câu 13:

Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions.

A thrifty buyer chases fruits and vegetables in season

Xem đáp án » 18/06/2021 460

Câu 14:

I am _______ at paying my bills on time

Xem đáp án » 18/06/2021 405

Câu 15:

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

Mrs Phuong, along with her students from Ha Noi, are planning to take part in charity in remote areas

Xem đáp án » 18/06/2021 388

Câu hỏi mới nhất

Xem thêm »
Xem thêm »