If you leave a piece of moist bread covered under a small bell jar at a warm place, mould grows on it in a few days. Answer the following with reference to this observation :
(a) How did the mould get inside the bell - jar?
(b) What would happen if the bread was not covered by the bell - jar?
(c) What would happen if moist bread was placed in a refrigerator?
(d) What appears first on the bread-the mycelia or the spores?
(e) How does bread mould obtain nourish-ment? What type of nourishment is it - epiphytic, autotrophic, parasitic symbiotic, or saprophytic?
If you leave a piece of moist bread covered under a small bell jar at a warm place, mould grows on it in a few days. Answer the following with reference to this observation :
(a) How did the mould get inside the bell - jar?
(b) What would happen if the bread was not covered by the bell - jar?
(c) What would happen if moist bread was placed in a refrigerator?
(d) What appears first on the bread-the mycelia or the spores?
(e) How does bread mould obtain nourish-ment? What type of nourishment is it - epiphytic, autotrophic, parasitic symbiotic, or saprophytic?
(a) Moulds are commonly present in air, water, etc. Hence, they were already present when moist bread was kept covered with the bell-jar.
(b) If bread was not covered with the bell-jar, moulds would have still appeared, but after some time. The warm and humid conditions inside the bell-jar promote the rapid production of mould.
(c) Moulds do not grow below freezing point inside a refrigerator.
(d) Mycelia appear first on the bread.
(e) Bread mould obtains its nourishment through extracellular digestion from the substratum on which it grows. This mode of nourishment is called saprophytic nutrition.
(a) Moulds are commonly present in air, water, etc. Hence, they were already present when moist bread was kept covered with the bell-jar.
(b) If bread was not covered with the bell-jar, moulds would have still appeared, but after some time. The warm and humid conditions inside the bell-jar promote the rapid production of mould.
(c) Moulds do not grow below freezing point inside a refrigerator.
(d) Mycelia appear first on the bread.
(e) Bread mould obtains its nourishment through extracellular digestion from the substratum on which it grows. This mode of nourishment is called saprophytic nutrition.
