II. Rewrite and translate in writing paragraphs 2, 4

III. Put questions to the underlined words.

1. Paramecia are commonly found in wet or moist p laces.

2. Dolphins can overtake high-speed ships.

3. John Lilly described his experiments on dolphins in detail.

4. In 1888 a dolphin led a ship through a dangerous place off the coast of New Zealand.

5. A pair of beavers can fell a tree four inches in diameter in 15 minutes.

IV. Put the verbs in brackets in the right form and voice. Translate the sentences into Russian in writing.

1. If we (to place) a crystal of table salt at the edge of a drop of hay infusion the Paramecia (to retreat) immediately to that part of the drop where the salt content (to be) less.

2. All sponges (to group) together in the porifera.

3. A single sponge (to have) a sac -like body which (to consist) of two layers of cells.

4. The first serious suggestion for botanical prospecting (to make) by a Russian scientist, S.M. Tkalich, in 1938.

5. There (to be) two classes of nucleic acids, deoxyribonucleic acid (DNA) and ribonucleic acid (RNA), and they (to differ) in structure as well as in function.

V. Translate the following sentences into Russian in writing pay attention to different forms of adjectives.

1. It is probably the oldest plant species.

2. Most of the Ericaceae family are shrubs but a few are trees and there are also some smaller herbaceous plants.

3. Some Asian bamboos are taller than many trees.

VI. Rewrite and translate the following sentences into Russian. Pay attention to the meanings of the verbs.

1. This plant can be introduced in our region.

2. The roots of this plant may be used for human food.

3. You must study the characteristics of both plants as there can be a considerable difference between them.

4. They could have chosen another way.

5. One is to remember that this reaction is often followed by an explosion.