Question 7 — Take 2 slices of bread - Questions at the end of the chapter - The Invisible Living World: Beyond Our Naked Eye

Last updated at July 15, 2026 by

Q 7
Question

Take 2 slices of bread. Place one slice in a plate near the sink. Place the other slice in the refrigerator. Compare after three days. Note your observations. Give reasons for your observations.

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Answer
Slice near the sink
Slice in the refrigerator
Warm and damp.
Cold and dry.
Microbes grow well in these conditions.
The cold slows microbes down.
Fuzzy mould appears after three days.
The slice stays fresh for much longer.
The slice near the sink grows mould; the one in the refrigerator stays fresh.

Explanation

  • Near the sink it is warm and moist, so mould (a fungus) grows.
  • The refrigerator is cold and dry, so microbes cannot grow well.
  • So the fridge slice stays fresh much longer.
Warmth and moisture let mould grow; cold slows microbes, so the fridge slice stays fresh.
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