Reading Comprehension 8

1. READ TEXT QUICKLY AND SIGN DIFFICULT WORDS

The protozoans, mimute aquatic creature, each of which consists of a single cell of protoplasm, constitute a classification of the most primitive forms of animal life. The very name protozoan indicates the scientific understanding of the animals. Proto- means first or primitive, and zoa refers to animals. They are fantastically diverse, but three major groups may be identified on the basis of their motility. The Mastigophora have one or more long tail that they use to propel 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 and row themselves about on their crusted bodies.

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.

Chlorophyl, which is the green substance encountered in plants, is found in the bodies of some protozoans, enabling them to make some of their own food from water and carbon dioxide. Protozoans are not considered plants but 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, such as eating, breathing, and reproducing.

Many species of protozoans collect into colonies, physically connected to one another are responding uniformly to outside stimulate. 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 technology improves methods of observation, better models of classification of these simple single cells will be proposed.

2. NEW VOCABULARY WITH THEIR MEANING

  • Constitute : to compose; form
  • Diverse : of a different kind, form, character, etc.
  • Motility : Biology. moving or capable of moving spontaneously
  • Propel : to drive, or cause to move, forward or onward
  • Locomotion : the act or power of moving from place to place.
  • Crusted : having a crust; encrusted.
  • Discriminate : to make a distinction in favor of or against a person or thing onthebasis of the group, class, or category to which the person or thingbelongs ratherthan according to actual merit
  • Regulates : to control or direct by a rule, principle, method, etc.
  • Enabling : conferring new legal powers or capacities, especially by removingadisability; having the right to license or regulate
  • Compounds : composed of two or more parts, elements, or ingredients
  • Stimulate : to rouse to action or effort, as by encouragement or pressure; spuron;incite
  • Necessitate : to make necessary or unavoidable
  • Constitutes : to compose; form

3. THE IDEAS OF EACH PARAGRAPH

  • Paragraph one : The protozoans, mimute aquatic creature, 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 tail that they use to propel 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 and row themselves about on their crusted bodies.
  • Paragraph two : In addition to their form of movement, several other features discriminate among the three groups of protozoans.
  • Paragraph three : Protozoans are not considered plants but animals, because unlike pigmented plants to which some protozoans are otherwise almost identical, they do not live on simple organic compounds.
  • Paragraph four : Many species of protozoans collect into colonies, physically connected to one another are responding uniformly to outside stimulate. As technology improves methods of observation, better models of classification of these simple single cells will be proposed.

4. ANSWER FROM THE QUESTIONS GIVEN

1. With what topics is the passage primarily concerned?

  • A. Colonies of protozoans
  • B. Mastigophora
  • C. Motility in protozoans
  • D. Characteristic of protozoans

2. The word mimute in paragraph 1 could best be replaced by ?

  • A. Very common
  • B. Very fast
  • C. Very old
  • D. Very small

3. What is protoplasm?

  • A. A class of protozoan
  • B. The substance that forms the cell of a protozoan
  • C. A primitive animal similar to a protozoan
  • D. An animal that develop from a protozoan

4. What does the author mean by the statement They are fantastically diverse, but three major groups may be identified on the basis of their motility?

  • A. The three major groups are unique in that they all move in the same manner.
  • B. Everything we know about the protozoans is tied into their manner of movement.
  • C. The manner of movement is critical when classifying the three major groups of protozoan.
  • D. Mobility in the protozoan is insignificant.

5. To which class of protozoans do the amoebae belong?

  • A. Mastigophora
  • B. Ciliata
  • C. Sarcodina
  • D. Motility

6. What is the purpose of the large nucleus in the Ciliata?

  • A. It generates the other nucleus.
  • B. It contains the genetic code for the small nucleus.
  • C. It regulates growth.
  • D. It reproduces itself.

7. Why are protozoans classified as animals?

  • A. They do not live on simple organic compounds.
  • B. They collect in colonies.
  • C. They respond uniformly to outside stimulate.
  • D. They may have more than one cell.

8. The word they in paragraph 3 refers to ?

  • A. Protozoans
  • B. Microscope
  • C. Investigations
  • D. Colonies

9. Which of the following statements is NOT true of protozoans?

  • A. There are approximately 40,000 species.
  • B. They are the most primitive forms of animal life.
  • C. They have a large cell and a smaller cell.
  • D. They are difficult to observe.

5. SUMMARY OF THE PASSAGE

The protozoans, mimute aquatic creature, 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 tail that they use to propel 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 and row themselves about on their crusted bodies. As technology improves methods of observation, better models of classification of these simple single cells will be proposed

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