Of the animals with backbones, the first to appear were ……

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.

In the very distant geological past, all animals were aquatic. The very first vertebrates or animals with backbones, of which we have any fossil record, lived in water. These vertebrates, the fish, were adapted to underwater living. Their streamlined bodies were covered with scales to reduce surface friction: they had muscular tails so that they could swim swiftly in such a dense medium as water; and they were endowed with gills for breathing underwater. Descendants of fish-type ancestors crossed the seashore barrier and accommodated themselves to life on land. As amphibians, they possessed limbs instead of fins and lungs instead of gills. But they never became completely free of the bonds that tied them to the water; even today many amphibians return to the water to lay their eggs. Millions of years after the first clumsy amphibians crawled over the land, newer types of land dwellers appeared, these animals give rise to the present-day reptiles and mammals. They were completely converted for land dwelling, with bodies and biological activities far different from those of fish. With these special adaptations, mammals have been able to colonize the woods and meadows, the deserts and high mountains, often far removed from the sea.

Of the animals with backbones, the first to appear were ……

• A. fish
• B. amphibians
• C. birds
• D. mammals

• Câu 2: Mã câu hỏi: 43686

  Fish are suited to underwater life because of their ………

  • A. gills
  • B. All of the answers
  • C. streamlines shapes
  • D. scales

• Câu 3: Mã câu hỏi: 43691

  The passage suggests that the first amphibians used their limbs to ……..

  • A. jump
  • B. run
  • C. swim
  • D. crawl

• Câu 4: Mã câu hỏi: 43693

  The word “descendants” is closest in meaning to _____.

  • A. Grandchildren
  • B. Ancestors
  • C. Descenders
  • D. Off spring

• Câu 5: Mã câu hỏi: 43700

  An example of an amphibian’s incomplete adaptation to land life is …….

  • A. need to keep its skin wet
  • B. return to water to lay eggs
  • C. inability to breathe air
  • D. scales-covered skin

• Câu 6: Mã câu hỏi: 43704

  Animals found desert living possible only ……….

  • A. when they were fully adapted to land
  • B. after they could walk on two feet
  • C. when they became amphibious
  • D. if they migrated to sea periodically

• Câu 7: Mã câu hỏi: 43737

  The seashore was a barrier for descendants of fish-type because ………

  • A. crossing it required bodily changes
  • B. every attempt to cross it ended in death
  • C. the land once rose much higher above the sea
  • D. once they crossed, there was no return

• Câu 8: Mã câu hỏi: 43738

  The adaptation process described in the article was completed ……

  • A. by the receding of the sea
  • B. through biological changes
  • C. over millions of years and through biological changes
  • D. over millions of years