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Observe specimens J, K, L, M, O and P and use them to answer questions 3(a) to 3(c). 3(a) Complete the table on food preservation below. 3(b) Name two groups of microorganisms responsible for the state of specimen P. 3(c) Mention two storage pests of specimen L.

Biology

ScanSolve AI Answer

a) Here is the completed table on food preservation:

Material for preservationOne specimen that could be preserved with materialName of method of preservationOne reason for preservation method
Hot air ovenGrains (e.g., maize)Drying/DehydrationRemoves water, inhibiting microbial growth.
Empty canCooked meatCanningCreates an anaerobic environment and prevents re-contamination.
FireFishSmokingDries food and introduces antimicrobial compounds from smoke.
SaltMeatSalting/CuringDraws out water from food and microorganisms by osmosis.
RefrigeratorFresh vegetablesRefrigeration/ChillingLow temperature slows down microbial growth and enzyme activity.

b) Assuming "specimen P" refers to a spoiled food item, two groups of microorganisms responsible for its state are:

  • Bacteria
  • Fungi (Moulds and Yeasts)

c) Assuming "specimen L" refers to a stored food item like grains or dried produce, two storage pests are:

  • Weevils (e.g., grain weevils)
  • Rats/Mice (Rodents)
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