Grammar: The Passive (Пассивный залог)

6. The verbs in the sentences below are in the passive voice. Read and translate them.

6) Organic matter is formed from thin air and water.

7) The energy that is needed for transformation of carbon dioxide and water into the organic substance is supplied by sunlight.

8) Dextrose may be converted into other sugars.

9) In the leaf cells are found small particles called chloroplasts.

10) Dextrose may be converted into other sugars or it may be combined with nitrogen to form the amino acids.

7. Choose the correct form. Is it the Active or the Passive?

11) Many vital processes (are well coordinated /coordinate well).

12) Air (penetrates/is penetrated) the leaves.

13) Only about 1 percent of the solar energy (is used/uses) for photosynthesis.

14) Dextrose (may convert/may be converted) into other sugars.

15) Part of the dextrose (is used/uses) for other purposes.

16) Mineral nutrition (is found/are found) only in the plants.

17) The energy that is needed for transformation of carbon dioxide and water is supplied (by/for) sunlight.

18) From dextrose 95 percent of the body of the tree is made (by/for) a series of complicated reactions.

Test yourself

8. Read the text again and choose the correct answer.

b) Respiration is similar in both plants and animals.

b) different b) various c) similar

2. Mineral nutrition is found in ….

a) plants and animals b) plants c) animals

3. In the process of …organic matter is formed from air and water.

a) respiration b) digestion c) photosynthesis

4. Trough millions of small pores air… the leaves.

a) converts b) penetrates c) forms

5. Chloroplasts are … in structure to the hemoglobin in blood.

a) similar b) red c) green

6. … combines with oxygen and hydrogen of water to form sugar.

a) carbon dioxide b) amino acids c) dextrose

7. Only…percent of solar energy is used for photosynthesis.

a) 10 b) 5 c) 1

8. Dextrose may be …into other sugars.

a) used b) converted c) divided

9. Read the text again and say if the following sentences are true or false or they don’t have the information.

- Gradually the tree reaches maturity.(t)

- Many vital processes in a tree are well coordinated.

- The process of photosynthesis is the building of hydrogen with the energy of light.

- The air contains the minute amounts of CO₂.

- Sunlight is composed of the various colours seen in a rainbow.

- In the leaf cells are found large particles called chloroplasts.

- The sugar formed in the process of photosynthesis is starch.

- Dextrose may be converted into other sugars.

Speaking: The Tree Comes of Age

10. Prove the importance of the process of photosynthesis. Illustrate it in some examples.

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