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Which of the following environmental conditions are essential for optimum growth of Mucor on a piece of bread? A. Temperature of about 25°C B. Temperature of about 5°C C. Relative humidity of about 5% D. Relative humidity of about 95% E. A shady place F. A brightly illuminated place Choose the answer from the following options:

1. (a) A, D and E only
2. (b) B, D and E only
3. (c) B, C and F only
4. (d) A, C and E only

Correct answer: (a) A, D and E only

Solution

Mucor grows best in warm conditions around 25°C, with high humidity so the bread stays moist, and in a shady place because strong light is not favorable. Low temperature, low humidity, and bright illumination do not support optimum growth.

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