D) altering its structure
39. The word colonies refers to ________.
A) tiny globules
B) watery regions
C) bacteria communities
D) little compartments
40. Commercial application of the research finding will be possible if salad cream can be made resistant to bacterial attack ________.
A) by varying its chemical composition
B) by turning it into a solid lump
C) while keeping its structure unchanged
D) while retaining its liquid form
Unit 2
21. B 22. A 23. B 24.D 25. C
26. A 27. C 28. C 29.A 30. B
31. D 32. B 33.C 34. D 35. A
36. A 37. B 38. D 39.C 40. D
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