Which one is not true about earthworm?

Options

A. It can live in the deficiency of O2 for 3-10 h.
B. It has a life span of 3 .5-10 years.
C. Pineal setae are dissolved in KOH
D. It is soilivorous

Answer

To determine which statement about earthworms is not true, we will analyze each statement provided in the question.

### Step-by-Step Solution:

1. **Evaluate the first statement**: "It can live in the deficiency of oxygen for 3 to 10 hours."
- Earthworms can survive in low oxygen environments for a limited time. They can tolerate some deficiency of oxygen but will eventually die without it. This statement is true.

2. **Evaluate the second statement**: "It has a lifespan of 3.5-10 years."
- The lifespan of earthworms varies by species, but many can live between 4 to 10 years under optimal conditions. This statement is also true.

3. **Evaluate the third statement**: "Pineal setae are dissolved in KOH."
- Setae are the locomotory organs of earthworms made of chitin. Potassium hydroxide (KOH) does not dissolve chitin. Therefore, this statement is false.

4. **Evaluate the fourth statement**: "It is soilivorous."
- Earthworms consume soil particles, which makes them soilivorous. This statement is true.

5. **Conclusion**: The statement that is not true about earthworms is: "Pineal setae are dissolved in KOH."

### Final Answer:
The statement that is not true about earthworms is: "Pineal setae are dissolved in KOH."

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