Under the Fair Trading Act, a merger is said to take place when two or more enterprises cease to be distinct. Once they come under common control, for example, in a situation where a minority stake allows one party to have a material influence over the policy of the other party, the Act sets out two tests to determine whether a particular merger can be investigated.

21. What are some examples of biological activities in which osmosis plays an important role?

22. What do facilitated diffusion and active transport have in common? What are the differences between them?

23. Which molecules make active transport through membranes possible?

24. How is the sodium-potassium pump involved in the functions of cell membranes? What is the importance of this protein for cells?

25. What is mass transport across the cell membrane?

26. What are the two main types of endocytosis?

27. How do plant cell walls react when placed in a hypotonic medium?

28. What is meant by the suction force of a plant cell? Does suction force facilitate or hinder the entrance of water into the cell?

29. What is the turgor pressure of plant cells? Does it make it easier or harder for water to enter plant cells?

30. What does the formula DPD = SF - TP mean?