Home
Class 12
BIOLOGY
Periplaneta americana is also known as A...

Periplaneta americana is also known as American cockroach. Which of the following information abuot it is incorrect?

A

Number of wings = 2 pairs

B

Number of legs = 3 pairs

C

Type of circulatory system = closed type

D

Number of ovaries = 2

Text Solution

AI Generated Solution

The correct Answer is:
To determine which information about Periplaneta americana (the American cockroach) is incorrect, we will analyze each option provided in the question step by step. ### Step 1: Analyze the first option **Option 1: Number of wings is two pairs.** - Cockroaches have two pairs of wings. The forewings (or tegmina) are present in the mesothorax, and the hindwings are present in the metathorax. - **Conclusion:** This statement is correct. ### Step 2: Analyze the second option **Option 2: Number of legs is three pairs.** - Cockroaches have three pairs of legs, with one pair on each thoracic segment: one pair on the prothorax, one pair on the mesothorax, and one pair on the metathorax. - **Conclusion:** This statement is correct. ### Step 3: Analyze the third option **Option 3: Type of circulatory system is closed.** - Cockroaches have an open circulatory system, meaning their blood (hemolymph) flows freely through cavities called sinuses rather than being confined to vessels as in a closed circulatory system. - **Conclusion:** This statement is incorrect. ### Step 4: Analyze the fourth option **Option 4: Number of ovaries is 2.** - Female cockroaches have two ovaries, which is a characteristic of their reproductive system. - **Conclusion:** This statement is correct. ### Final Conclusion The only incorrect statement about Periplaneta americana is: - **Option 3: Type of circulatory system is closed.**
Promotional Banner

Similar Questions

Explore conceptually related problems

Which of the following is cockroach?

Which of the following is incorrect match?

Which of the following act as a brain in cockroach ?

Which of the following is a wrong match in cockroach?

In cockroach which of the following help in exchange of gases ?

Which of the following statement is incorrect ?

Which of the following statement is incorrect ?

Which of the following statement is incorrect :

Which of the following mouth part act as tongue in cockroach?