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प्रश्न
Observe the following figure and answer the questions :
- Identify the process shown in the figure.
- Explain the process in short.
उत्तर
- Modern land filling site
- Process:
- Degradable waste being accumulated in urban areas is used for this purpose.
- Large pits are dug in open spaces far away from the residential area and those pits are lined with plastic sheets as a precaution against the pollution of soil due to leaching of toxic and harmful materials.
- Compressed waste is dumped in the pit. It is covered with layers of soil, saw dust, leafy waste and specific biochemicals. Bioreactors are mixed in some places.
- Microbes present in soil and other top layers decompose the waste. Completely filled pit is sealed with soil slurry.
- Best quality compost is formed after few days. Such land filling sites can be reused after removal of compost.
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संबंधित प्रश्न
The most common carrier of communicable diseases is ___________.
Match the organisms in Column A with their action in Column B.
| A | B | ||
| (i) | Bacteria | (a) | Fixing Nitrogen |
| (ii) | Rhizobium | (b) | Setting of curd |
| (iii) | Lactobacillus | (c) | Baking of bread |
| (iv) | Yeast | (d) | Causing Malaria |
| (v) | A protozoan | (e) | Causing Cholera |
| (vi) | A Virus | (f) | Causing AIDS |
| (g) | Producing antibodies |
Match the pairs
| ‘A’ group | ‘B’ group | ||
| a. | Xylitol | 1. | Pigment |
| b. | Citric acid | 2. | To impart sweetness |
| c. | Lycopene | 3. | Microbial restrictor |
| d. | Nycin | 4. | Protein binding emulsifier |
| 5. | To impart acidity | ||
Give a scientific reason.
Use of mutant strains has been increased in industrial microbiology.
State whether the following statement is true or false. Explain your statement.
Tomato wilt is a viral disease.
Write the characteristics of viruses.
Who am I?
I have a nucleus and membrane-bound cell organelles.
Who am I?
I reproduce mainly by cell division.
Who am I?
I can produce my replica.
Draw a neat and labelled diagram.
Bacteriophage.
What are micro-organisms?
Complete the following conceptual picture:
What are the main features of a microorganism?
Name the four major groups of Microbes.
While returning from the school, Boojho ate chaat from a street hawker. When he reached home, he felt ill and complained of stomach ache and fell ill. What could be the reason?
‘Cry’ protein is produced by the bacteria ______.
Yeasts are a rich source of ______.
Mention the symptoms of poliomyelitis.
