Advertisements
Advertisements
Question
Why is it necessary to ban the use of plastic bags?
Solution
Plastic bags are non biodegradable products which pose a serious threat to the environment. Non biodegradable products do not decompose easily and thus keep on accumulating in the environment. There are various other reasons for which plastic bags should be banned, for example:
- plastic bags, on getting into drains and sewer system, choke them up resulting in spilling of dirty water on the roads
- burning of plastic bags produces harmful gases, which can cause health problems
- street animals may consume these plastic bags, which may even result in their deaths.
APPEARS IN
RELATED QUESTIONS
Explain the importance of biopesticides in organic farming.
Give scientific reasons.
Microbial enzymes are used instead of chemical catalysts in chemical industry.
__________ is a powerful antibiotic against treatment of tuberculosis.
Find an odd one out.
Find an odd one out.
Vinegar means 4% ___________.
Shelf life of yogurt can be increased by pasteurization.
Methane gas is produced by microbial oxidation of industrial waste.
Sulphuric acid is a source of energy for some species of bacteria like Acidophillium.
Match the following.
| Column A | Column B |
| 1) Baker’s yeast | a) Probiotics |
| 2) Sauerkraut | b) Bread |
| 3) Ligases | c) Antibiotics |
| 4) Penicillin | d) Microbial enzyme |
Give scientific reason.
Microbial enzymes are eco-friendly.
Write a short note.
Microbial Enzymes
How microorganisms are useful in the field of medicine?
State whether true or false. If false, correct the statement.
Rhizobium, associated with root nodules of leguminous plants fixes atmospheric nitrogen.
Unscramble the jumbled word underlined in the following statement.
Curbossulite is an air-borne disease caused by a bacterium.
Match the microorganisms given in the Column A to the group to which they belong in Column B.
| Column A | Column B |
| (a) Lactobacillus | (i) Algae |
| (b) Aspergillus | (ii) Protozoa |
| (c) Spirogyra | (iii) Fungi |
| (d) Paramecium | (iv) Bacteria |
The first antibiotic ______ was developed by ______.
Complete the chart on production of beverages.
| S. No. | Fruit | Microbe used | Role of microbe used | Name of beverage |
| (a) | Caffea arabica | ______ | Separating seeds from fruit | Coffee |
| (b) | Theobroma cacao | Candida, Hansenula, Pichia, Saccharomyces | ______ | Cocoa |
Lactobacillus brevis gives us the beverage ______.
