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Statement (S) : Respiratory system of Pe...

Statement (S) : Respiratory system of Periplaneta is "polyneustic" type
Reason ( R) : In Periplaneta thoracic spiracles help in inspiration

A

S is correct but R is wrong

B

S is wrong but R is correct

C

Both S and R are correct and R is correct explanation of S

D

Both S and R are correct and R is not correct explanation of S

Text Solution

AI Generated Solution

The correct Answer is:
To analyze the given statement and reason regarding the respiratory system of Periplaneta (the cockroach), we can break down the solution into clear steps: ### Step-by-Step Solution: 1. **Understanding the Statement**: - The statement claims that the respiratory system of Periplaneta is "polyneustic" type. - "Polyneustic" refers to the presence of more than three pairs of spiracles in an organism. 2. **Identifying the Organism**: - Periplaneta is the scientific name for the common cockroach. - Cockroaches indeed possess multiple spiracles, which confirms the statement. 3. **Understanding the Reason**: - The reason states that in Periplaneta, thoracic spiracles help in inspiration. - Inspiration in cockroaches occurs through the opening of thoracic spiracles while abdominal spiracles remain closed. 4. **Analyzing the Correctness of the Statement**: - The statement is correct because cockroaches have more than three pairs of spiracles, thus their respiratory system is classified as polyneustic. 5. **Analyzing the Correctness of the Reason**: - The reason is also correct as thoracic spiracles do play a role in the process of inspiration. - However, the reason does not explain why the respiratory system is termed "polyneustic." The classification is based on the number of spiracles rather than their function. 6. **Conclusion**: - Both the statement and the reason are correct, but the reason is not the correct explanation for the statement. - Therefore, the correct answer is that both are correct, but the reason is not the correct explanation of the statement. ### Final Answer: Both the statement and the reason are correct, but the reason is not the correct explanation of the statement. ---
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