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प्रश्न
State whether the following statement is true or false. Explain your statement.
Tomato wilt is a viral disease.
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उत्तर
This statement is true.
Explanation:
- In Australia, the tomato wilt disease was first identified in 1919.
- Later, it was found that the tomato-spotted wilt virus is responsible for the disease's spread.
- The disease causes leaves to turn from green to yellow-brown colour.
- As they begin to droop, the leaves' shapes change.
संबंधित प्रश्न
Alcohol is produced with the help of _________.
Carrier of malaria-causing protozoan is ___________.
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 |
Unscramble the jumbled word underlined in the following statement.
Cells of our body produce santiidobe to fight pathogens
Yeasts are a rich source of ______.
Assertion: Bacillus Thuringiensis is a biocontrol agent.
Reason: It produces a protein called ‘cry protein’ which kills insect larva.
Which of the following best characterizes the relationship between microorganisms and human welfare?
Based on their ecological function and characteristics, which of the following organisms would be classified as decomposer microorganisms?
In what way do the four main parts of a cell work together to enable microorganisms to function as independent living units?
