XVI. Translate into English:

a) 1. The history of classification of animals is believed to have started with Linneus. 2. D. I. Mendeleev, a famous Russian chemist, was the jirst to discover the law of dependence of the properties of elements upon their atomic weights. 3. The problem to be solved at this stage is an entirely difficult one. 4. Deepsea bacteria have proved to be even more sensitive to heat than those from shallow waters. 5. Many proposals for changing the traditional methods of storing and searching for information have been made in the last decade, and some of these have already proved to be of considerable practical value. 6. D. I. Mendeleev found the properties of the elements to repeat themselves after a definite number of steps. 7. The traditional approach to this problem is to consider each new process as a new problem. 8. Electron microscopes are likely to be wider used than compound ones. 9. The approach to this problem was supposed to be wrong.

b) 1. Sound is known to travel in watec at the speed of about a mile a second, the exact speed depending upon the temperature of water. 2. Being only a few years old bionics has already great significance in biology. 3. To establish the relationships of these groups two things must be taken into consideration. 4. The temperature was too low for germination to begin. 5. Robert Hooke found thin slices of cork to be made up of little boxes which he called cells. 6. Specificity of enzymes action is thought to be related to the properties of the enzyme protein. 7. For the entire seed to swell, moisture should be transferred to the embryo and endosperm. 8. The causes of cancer in human beings are not known, but certain specific factors are known to be related to the development of the condition. 9. In many instances the sex patterns of plants appear to be influenced more readily by environmental factors han does that of animals. 10. Enzymes are very sensitive to acids and might be expected to start reverse activities when changes in acidity occur. 11. Not all of water present in soil is capable of being drawn by the root of plants.

c) l.This soil is said to be in good structural condition. 2. His habit being to water fruit trees regularly, he got good results. 3. Your success depends on your working well. 4. Your being late is inexcusable. 5. Your friends having been late is inexcusable too. 6. To do this we must know the composition of plants. 7. The data to be obtained as a result of their research work are of great importance. 8. Not a single one of these substances being effective, the'y applied some new ones to control this method. 9. To succeed in your work you have to work better. 10. We have created all the necessary conditions for this experiment to be continued. 11. We have to introduce scientific farming methods. 12. The conditions must have been too moist for this plant to develop well.