Ravi took two bread slices and kept them in the following conditions, a)slice 1 in a dried and dark place. b)slice 2 in a moist and dark place. What would he observe in each of the above conditions? Give reasons for your answer.
Answers
Explanation:
This is because tiny spores of Rhizopus are always present in air which thrive in humid conditions. This is why on the slice 2 kept in moist and dark place, formation of sporangia and spores takes place, which are favourable for the growth of fungus.
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Answer :
(i) In slice 1, no change will be observed or it will remain sterile because it lacks moisture.
(ii) A white cottony mass surrounded with black pin head-like structures are seen spreading on the surface of slice 2. This is because tiny spores of Rhizopus are always present in air which thrive in humid conditions. This is why on the slice 2 kept in moist and dark place, formation of sporangia and spores takes place, which are favourable for the growth of fungus.
(iii) In slice 3, also no change is observed (remains sterile) as it is kept at low temperature in the refrigerator and at low temperature.
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