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If an earthworm is left in 40 % KOH solution for a long time, Which part would be left undissolved.
[ RPMT-85]
- a)Setae
- b)Spermatheca
- c)Sand particles
- d)Circular muscles
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
If an earthworm is left in 40 % KOH solution for a long time, Which pa...
Setae is made up of chitin. KOH dissolves chitin. Setae can be isolated
Most Upvoted Answer
If an earthworm is left in 40 % KOH solution for a long time, Which pa...
Explanation:
When an earthworm is left in a 40% KOH (potassium hydroxide) solution for a long time, the part that would be left undissolved is the setae.
1. Earthworm Anatomy:
An earthworm has a cylindrical body that is segmented. It has various structures like setae, spermatheca, circular muscles, etc.
2. KOH Solution:
KOH is a strong base that is commonly used in laboratories. It is highly corrosive and capable of dissolving many organic compounds.
3. Setae:
Setae are bristle-like structures present on the body of an earthworm. They are small, stiff hairs that protrude from the body wall. Earthworms use setae to anchor themselves and move through the soil.
4. Reaction with KOH:
When an earthworm is placed in a 40% KOH solution, the KOH reacts with the organic compounds present in the earthworm's body. The reaction between KOH and organic matter results in the dissolution of most of the earthworm's body, including the soft tissues and muscles.
5. Resistance of Setae:
However, setae are composed of a tough and resistant material called chitin. Chitin is a polysaccharide that is highly resistant to chemical degradation. It is insoluble in KOH and many other solvents.
6. Undissolved Setae:
Due to the resistant nature of setae, they are not dissolved by the 40% KOH solution. Even though the soft tissues and muscles of the earthworm may dissolve over time, the setae remain intact.
Conclusion:
In summary, when an earthworm is left in a 40% KOH solution for a long time, the setae are the part that would be left undissolved. This is due to the resistant nature of setae and their composition of chitin, which is insoluble in KOH.
When an earthworm is left in a 40% KOH (potassium hydroxide) solution for a long time, the part that would be left undissolved is the setae.
1. Earthworm Anatomy:
An earthworm has a cylindrical body that is segmented. It has various structures like setae, spermatheca, circular muscles, etc.
2. KOH Solution:
KOH is a strong base that is commonly used in laboratories. It is highly corrosive and capable of dissolving many organic compounds.
3. Setae:
Setae are bristle-like structures present on the body of an earthworm. They are small, stiff hairs that protrude from the body wall. Earthworms use setae to anchor themselves and move through the soil.
4. Reaction with KOH:
When an earthworm is placed in a 40% KOH solution, the KOH reacts with the organic compounds present in the earthworm's body. The reaction between KOH and organic matter results in the dissolution of most of the earthworm's body, including the soft tissues and muscles.
5. Resistance of Setae:
However, setae are composed of a tough and resistant material called chitin. Chitin is a polysaccharide that is highly resistant to chemical degradation. It is insoluble in KOH and many other solvents.
6. Undissolved Setae:
Due to the resistant nature of setae, they are not dissolved by the 40% KOH solution. Even though the soft tissues and muscles of the earthworm may dissolve over time, the setae remain intact.
Conclusion:
In summary, when an earthworm is left in a 40% KOH solution for a long time, the setae are the part that would be left undissolved. This is due to the resistant nature of setae and their composition of chitin, which is insoluble in KOH.
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If an earthworm is left in 40 % KOH solution for a long time, Which part would be left undissolved.[ RPMT-85]a)Setaeb)Spermathecac)Sand particlesd)Circular musclesCorrect answer is option 'A'. Can you explain this answer?
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