XIV. Analyse and translate the following sentences 4 (ing-forms):

1. Studying the complex biological phenomena manifested in hydridization, Mitchurin developed entirely new methods, not known before him either in biological science or in tfie practical work of plant or animal breeders.

2. We were surprised at his not being invited to the party. 3. I am greatful for your having invited me. 4. The presence of this toxin having been detected, the patient was injected with antitoxin. 5. We couldn't clear up some points in the report without asking some questions. 6. The stability of the compound being formed must be considered. 7. Hydrogen is the lightest substance known. 8. The flowers pollinated by fliers are most often dark in colour. 9. Leaves on plants grown in darkness are very small. 10. There is a difference of opinion as to the amount of

carbon taken from the soil by the roots of plants. 11. The possibility of demonstrating specific parts of the intestinal tract as being responsible for the intoxication seen in those animals was explored in two ways. 12. The leaves, having no growth tissue, are secondary structures. 13.Photosynthesis forms sugar which is temporarily changed to starch, this keeping down sugar concentration in the cell. 14. Any plant part used as food contains several vitamins. 15. Leaves are born mostly at the tops of branches, the main limbs toward the trunk being devoid of them. 16. Botany-Zoology system grew up naturally as biologic science developed, the emphases during its early years being placed on structure and relationships. 17. The sources of materials used have been recorded elswhere. 18. The theoretical treatment given is based entirely upon the experiment. 19. Before being planted, potatoes are cut into several pieces, each piece having at least one eye. 20. Unfortunately it is not possible to present in this book all the information obtained. 21. The size of microorganisms is usually expressed in microns, a micron being one thousandth of a millimeter. 22. Verterbrates known as fishes are widely distributed, being found in water in nearly all parts of the earth. 23. Having made a great number of experiments with different substances the chemists found that most of them could be decomposed into other substances. 24. The succession of plants during a single growing season illustrates the distribution of plants by temperature, the spring plant being able to endure greater cold than can those of the summer. 25. Plants grown in the dark are always colourless, chlorophyll becoming green only under the action of light. 26. Abundant water being combined with high temperature, luxuriant vegetation is the result. 27. My little sister dislikes,being alone at home. 28. Not all water present in soil is capable of being drawn by the root of plants. 29. There is a possibility of his being sent to this conference. 30. In this figure you can see a diagram of recording. 31. After having checked the temperature twice he decided to change conditions of the experiment. 32. In some species the vessels may be of both large and small diameter, the large vessels being concentrated in the wood formed early in the growing season. 33. In many lower plants there is little organization and differentiation of the plant body, the individual cells being held together very loosely. 34. Birds have no teeth, the food being swallowed without chewing. 35. All primates resemble man to some degree, the resemblance being least marked in the monkeys. 36. Many birds thrive in the Arctic, the sea birds being more numerous than the land ones. 37. The frog is a cold-blooded animal, its temperature varying with the environment. 38, Children lacking sufficient vitamin C, their teeth frequently decay easily. 39. Cold-blooded forms possess no heat-producing or heat-regulating mechanisms, their bodies tending to take the temperature of the surrounding water. 40. Only the snakes have no eyelids at all, their eyes being fixed in a permanent glassy stare. 41. Whether a substance is an element or not could be determined by experimenting. 42. We insist on their taking part in this experiment. 43, During the experiment I needed recording temperature immediately.