Advertisements
Advertisements
Question
How is soil pollution controlled by microbes?
Solution
- Acid rain is rainwater containing harmful amounts of sulphuric acid and nitric acid.
- Some species of bacteria like Acidiphilium and Acidithiobacillus ferrooxidans, use sulphuric acid as a source of energy.
- Introduction of such bacteria in soil polluted by acid rain can make the soil fertile again.
- Also, soil pollution occurring due to chemical fertilizers can be prevented due to use of these microbial inoculants.
APPEARS IN
RELATED QUESTIONS
A) Lack of management of which factor is shown in the picture?
B) How can that factor be managed with the help of microbes?
C) How the oil spills in oceans are cleared?
Answer the following.
How does the bread become spongy?
Salts which can be used as supplement of calcium and iron are obtained from ______ acid.
____________ acid is used in the production of vitamins.
_________ is used in the commercial bakery industry.
Find an odd one out.
Lactic acid : To impart acidity : : Beta carotene : _____________________
Vinegar is used to bring sweetness in food products.
Antibiotics cannot be obtained from a variety of bacteria and fungi.
Match the following.
| Column A | Column B |
| 1) Aspartame | a) Anaerobic respiration |
| 2) Fermentation | b) Microbial restrictor |
| 3) Niacin | c) Vanillin |
| 4) Essence | d) Sweetener |
Write a short note.
Bioinsecticides
Explain – Importance of microbes in sewage (water) treatment in cities.
What is the importance of probiotics to humans?
Observe the figure and write the answers to the questions asked.
- Name the above figure.
- What is it used for?
- Which gas is formed in it?
- How is this gas formed?
- What is done with sewage?
Read the following paragraph and write the answers to the questions asked.
Sulphuric acid is present in the acid rain and materials coming out of mines. You know that erosion of metals present in statues, bridges and buildings occurs due to it. Sulphuric acid is a source of energy for some species of bacteria like Acidiphilium spp. and Acidithiobacillus ferrooxidans. Hence, these bacteria can control the soil pollution occurring due to acid rain. Water soluble salts of uranium are present in the wastes produced during electroplating and in effluent released in the environment from the atomic energy plant. Geobacter convert these salts of uranium into insoluble salts and thereby prevent those salts from mixing with groundwater sources.
- What causes metal erosion in statues, bridges and buildings?
- Sulphuric acid is the source of energy for which bacteria?
- What kind of pollution do these bacteria control?
- What are the water soluble salts in atomic energy plants and in the process of electroplating?
- Which bacteria prevent these salts from mixing with ground water by converting them Into insoluble salts?
______ is a biocontrol agent.
Nostoc is used for fixing nitrogen.
In the process of making bread the carbohydrates in the flour are fermented by baker's yeast and sugar is transformed into carbon dioxide and ______.
The figure below shows a concept of segregation, observe the following figure and answer the questions that follow:
- What is dry and wet waste?
- Why do we need to segregate our garbage?
Complete the given paragraph by filling the blank spaces from the options given in the bracket:
[oxygen, pyridines, mechanical, CO2, petroleum, fatal, polyester, norcadia]
Spilling of ______ oil occurs in ocean due to various reasons. This oil may prove ______ and toxic to aquatic organisms. It is not easy to remove the oil layer from surface of water by ______ method. However, bacteria like pseudomonas spp. and Alcanovorax borkumensis have to ability to destroy the ______ and other chemicals. Hence, these bacteria are used to clear the oil spills. These are called as hydrocarbonoclastic bacteria (HCB). HCB decompose the hydrocarbons and bring about the reaction of carbon with ______. ______ and water is formed in this process.
