Câu hỏi:

22/07/2024 179

Read the following passage on transport, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 38 to 42.

(1) The protozoans, minute, aquatic creatures each of which consists of a single cell of protoplasm, constitute a classification of the most primitive forms of animal life. They are fantastically diverse, but three major groups may be identified on the basis of their motility. The Mastigophora have one or more long tails, which they use to project themselves forward. The Ciliata, which use the same basic means for locomotion as the Mastigophora, have a larger number of short tails. The Sarcodina, which include amoebae, float or row themselves about on their crusted bodies.

(2) In addition to their form of movement, several other features discriminate among the three groups of protozoans. For example, at least two nuclei per cell have been identified in the Ciliata, usually a large nucleus that regulates growth but decomposes during reproduction, and a smaller one that contains the genetic code necessary to generate the large nucleus.

(3) Protozoans are considered animals because, unlike pigmented plants to which some protozoans are otherwise almost identical, they do not live on simple organic compounds. Their cell demonstrates all of the major characteristics of the cells of higher animals.

(4) Many species of protozoans collect into colonies, physically connected to each other and responding uniformly to outside stimulae. Current research into this phenomenon, along with investigations carried out with advanced microscopes may necessitate a redefinition of what constitutes protozoans, even calling into question the basic premise that they have only one cell. Nevertheless, with the current data available, almost 40,000 species of protozoans have been identified. No doubt, as the technology improves our methods of observation, better models of classification will be proposed.  

With what topic is the passage primarily concerned?

A. Colonies of protozoans

B. Mastigophora

C. Motility in protozoans

D. Characteristics of protozoans

Đáp án chính xác

Trả lời:

verified Giải bởi Vietjack

Đáp án D

          A. Colonies of protozoans: các loại sinh vật đơn bào

          B. Mastigophora: Nhóm Mastigophora

          C. Motility in protozoans: tính chất của sinh vật đơn bào

          D. Characteristics of protozoans: đặc điểm của sinh vật đơn bào

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Câu 3:

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Câu 5:

Read the following passage and mark the letter A, B, C or D on you answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 31 to 35. Fill in the appropriate word in question 34

How men first learnt to (33) ........ words is unknown; in other words, the origin of language is a mystery. All we really know is that men, unlike animals, (34) ............ invented certain sounds to express thoughts and feelings, actions and things so that they could communicate with each other; and that later they agreed (35) ........... certain signs, called letters, which could be combined to represent those sounds, and which could be written down. These sounds, (36) .......... spoken or written in letters, are called words. Great writers are those who not only have great thoughts but also express these thoughts in words that apeal powerfully to our minds and emotions. This charming and telling use of words is what we call literary (37) ........... Above all, the real poet is a master of words.

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Câu 7:

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Mark the letter A, B, C, or D on your answer sheet to indicate sentence that is similar in meaning to

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Câu 10:

Read the following passage and mark the letter A, B, C or D on you answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 31 to 35. Fill in the appropriate word in question 35

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Câu 11:

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Câu 14:

Read the following passage on transport, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 38 to 42.

(1) The protozoans, minute, aquatic creatures each of which consists of a single cell of protoplasm, constitute a classification of the most primitive forms of animal life. They are fantastically diverse, but three major groups may be identified on the basis of their motility. The Mastigophora have one or more long tails, which they use to project themselves forward. The Ciliata, which use the same basic means for locomotion as the Mastigophora, have a larger number of short tails. The Sarcodina, which include amoebae, float or row themselves about on their crusted bodies.

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(4) Many species of protozoans collect into colonies, physically connected to each other and responding uniformly to outside stimulae. Current research into this phenomenon, along with investigations carried out with advanced microscopes may necessitate a redefinition of what constitutes protozoans, even calling into question the basic premise that they have only one cell. Nevertheless, with the current data available, almost 40,000 species of protozoans have been identified. No doubt, as the technology improves our methods of observation, better models of classification will be proposed.  

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Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.

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