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Question
State whether the following statement is true or false. Explain your statement.
Tomato wilt is a viral disease.
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Solution
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.
RELATED QUESTIONS
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 |
Who am I?
I am green, but don't have organs.
Complete the following conceptual picture:
Disease-causing microorganisms are called pathogens.
Unscramble the jumbled word underlined in the following statement.
Cells of our body produce santiidobe to fight pathogens
Assertion (A): Boiling milk is a method of preservation.
Reason (R): Probiotic is a method of preserving milk.
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.
Mention the symptoms of poliomyelitis.
