Which of the following is not a use of micro-organisms?
A. preparation of medicines (or drugs)
B. preparation of food by photosynthesis
C. recycling of materials in nature
D. increasing the fertility of soil
Answer:D
Which of the following is not a use of micro-organisms?
A. preparation of medicines (or drugs) B. preparation of food by photosynthesis C. recycling of materials in nature D. increasing the fertility of soil