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‘Pathogens' are I. Normally non-diseas...

‘Pathogens' are
I. Normally non-disease causing in nature.
II. Bacteria, viruses, fungi, protozoans, helminths are few examples of pathogens.
III. It causes harm to the host by living in (or on) them.
(a) I and III
(b) ll and III
(c) I and II
(d) All are correct

A

I and III

B

ll and III

C

I and II

D

All are correct

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question about pathogens, let's analyze each statement provided: 1. **Statement I**: "Normally non-disease causing in nature." - This statement is **incorrect**. Pathogens are, by definition, organisms that cause disease. While some microorganisms can be harmless or even beneficial, pathogens are specifically those that lead to disease. 2. **Statement II**: "Bacteria, viruses, fungi, protozoans, helminths are few examples of pathogens." - This statement is **correct**. All the mentioned organisms are indeed types of pathogens that can cause diseases in hosts. 3. **Statement III**: "It causes harm to the host by living in (or on) them." - This statement is also **correct**. Pathogens typically invade a host organism and can cause harm by utilizing the host's resources, leading to illness. Now, let's summarize the correctness of each statement: - Statement I: Incorrect - Statement II: Correct - Statement III: Correct Based on this analysis, the correct option is: (b) II and III ### Step-by-Step Solution: 1. Analyze Statement I: Determine if pathogens are normally non-disease causing. 2. Analyze Statement II: Identify examples of pathogens. 3. Analyze Statement III: Understand how pathogens cause harm to hosts. 4. Evaluate the correctness of each statement. 5. Select the option that contains the correct statements.
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