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E. Give reasons for the following.
1. Food kept in the open by hawkers should not be consumed.
2. Vacuum packing is commonly used to store nuts.
3. Stems of sugarcane show dull red colour along with White patches on stalks.
4. Common cold and conjunctivitis are communicable diseases.
5. Microorganisms can help in the production of fuel for energy
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Answers
Explanation:
1. When you open food, you might introduce outside bacteria into the food inside.
2.Vacuum packing reduces atmospheric oxygen, limiting the growth of aerobic bacteria or fungi, and preventing the evaporation of volatile components. It is also commonly used to store dry foods over a long period of time, such as cereals, nuts, cured meats, cheese, smoked fish, coffee, and potato chips (crisps).
3.The canes are to be split open lengthwise to see dull red tissue, interrupted by white patches across the stalk. These patches are characteristic of red rot of sugarcane.
4.The common cold and conjunctivitis is an upper respiratory tract infection caused by many different viruses. The common cold and conjunctivitis are transmitted by virus-infected airborne droplets or by direct contact with infected secretions.
5.For energy production, microbes offer efficient and sustainable ways to convert plants or other biomass into liquid fuels, hydrogen, methane, electricity, or chemical feedstocks currently derived from fossil fuels. ... Microbial-plant relationships can improve the sustainability of biofuel production.
ANSWER :
( E ) GIVE REASON FOR THE FOLLOWING -
(1) MOST TYPE OF STREET FOOD ARE GENERALLY PREPARED IN THE OPEN. THERE IS A CHANCE OF CONTAMINATION OF THE FOOD WITH DIRTY WATER. ALSO, STREET VENDORS SELLING FRUIT JUICE SHOULD NOT BE CONSUMED AS THEY ARE GENERALLY PREPARED OUTSIDE AND SERVED LATER ON, LEADING TO CONTAMINATION BY INFECTIOUS PATHOGENS.
(2) VACUUM PACKING REDUCES ATMOSPHERIC OXYGEN, LIMITING THE GROWTH OF AEROBIC BACTERIA OR FUNGI, AND PREVENTING THE EVAPORATION OF VOLATILE COMPONENTS. IT IS ALSO COMMONLY USED TO STORE DRY FRUITS OVER A LONG PERIOD OF TIME, SUCH AS CEREALS NUTS, CURED MEATS, CHEESE, SMOKED FISH, COFFEE AND POTATO CHIPS. (CRISPS)
(3) RED ROT IS THE MOST COMMON DISEASE OF SUGARCANE, CAUSED BY THE FUNGUS COLLETOTRICHUM FALCATUM WENT. IT CAUSES SEVERE LOSS IN YIELD AND QUALITY OF THE SUSCEPTIBLE CULTIVARS IN THE INDIAN SUB-CONTINENT.
(4) THE COMMON COLD AND THE CONJUCTIVITIS IS AN UPPER RESPIRATORY TRACT INFECTION CAUSED BY MANY DIFFERENT VIRUSES. THE COMMON COLD AND THE CONJUCTIVITIS ARE TRANSMITTED BY VIRUS-INFECTED AIRBORNE DROPLETS OR BY DIRECT CONTACT WITH INFECTED SECRETIONS.
(5) MICROBES ARE ABLE TO PRODUCE FUELS DIRECTLY FROM THE BIOMASS OF PLANTS THAT ARE NOT USED AS FOOD FROM HUMANS OR FEED FOR ANIMALS. EVEN THE FUMES FROM LAND FILLS CAN BE USED AS A BIOMASS ENERGY SOURCE.
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