Introduction to biology. Кулагина Ж.Д. - 15 стр.

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         1. Plants (grouped according to their structure) form a gender.
         2. Plants (being grouped according to their structure) form a gender.

1) problems / to be investigated by scientists, 2) respiration / to be carried out by lungs,
3) photosynthesis / to be performed by plants, 4) metabolic wastes and excretory
products / to be ejected from the cell, 5) the cytoplasm / to be moved to another part of
the cell, 6) the nutritive substances / to be passed through the membrane, 7) the green
tissue of leaves / to be exposed to light, 8) the foods / to be manufactured by plants, 9)
inorganic substances / to be converted in plants into organic ones, 10) mineral salts / to
be dissolved in water, 11) water / to be left* in the cell.

      Ex. 10. Use Participle constructions in the sentences below.

Model A: All the plants which are grown in this region require fertilizers.
         All the plants grown in this region require fertilizers.
Model B: There are living things which live and grow inside our bodies.
         There are living things living and growing inside our bodies
Model C: A system of classification has been set up. It sorts plants and animals
       according to their structure.
       A system of classification has been set up sorting plants and animals
       according to their structure.
Model D: When he conducted his experiments he tried different approaches to the
       problem.
        Conducting his experiments he tried different approaches to the problem.

1. Medicine, physiology and agriculture are fields of knowledge which require
elementary training in general biology. 2. There are plants which have no apparent
blossoms. 3. Plant cells have a cell wall which is actually non-living in chemical nature.
4. If some bacteria live and grow inside our bodies they may cause diseases. 5. Some
bacteria live and grow inside our bodies and cause diseases. 6. At the conference they
discussed the kinds of observations which had been made. 7. We must select the
varieties which are being grown for storage. 8. Camels can live in dessert for two or
three weeks and eat only dry food and drink no water.

                                          Step 2
      Ex. 11. Read the text and tell what it is about in one or two sentences.

       No one knows how many different kinds of plants and animals there are. Some
scientists estimate the number of three million. Many of them provide us with food,
clothing, shelter and medicines. Some, (including several kinds of insects), pierce our
skin and feed on the blood. Some of living things even live and grow inside our bodies.
In this way they may cause diseases. You can see why scientists study living things with