14. a) use the correct form of the verb in brackets in the passive voice. b) rewrite sentences 4, 7, 8, 9 and 12 in the active voice. 1. at present, research in physiology (to concentrate) on the integra- tion of the different activities of cells, tissues, and organs at the level of the intact organism. 2. some problems of mammalian physiology already (to investigate) from a classical-organ and organ-system point of view, but comparative studies in physiology (to continue) in future.
3. high milk yields (to maintain) if feeding rations (to calculate) on the basis of physiological parameters of animals. 4. in the 19th century, methods of the physical sciences (to apply) to physiology by carl ludwig, a famous german physiologist. 5. the project for scientific cooperation between the research institutes (to consider) at the conference next week. 6. in an early scientific classification, tissues (to divide) on the basis of the organ system of which they formed a part, for instance, nervous tissues. 7. the principles of experimentation in the life sciences (to suggest) by a french physiologist claude bernard in pothe 19th century.8. careful and rather expensive research (to carry out) by the biochemists at the cell level now. 9. the basis for the physiology of microorganisms (to provide) by the concept of comparative biochemistry. 10. common or general features usually (to find) at the cellular and molecular levels of organisation for animals and plants. 11. even now physiology is still of great importance among the functional sciences that (to relate) closely to the field of medicine. 12. the first journal which o devote) mainly to the publication of research results in physiology o publish) by sir michael foster, a professor of practical physiology at university college in london, in 1878.​