Which of the following features is used to identify a male cockroach from a female cockroach?

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Biology

Q.
Which of the following features is used to identify a male cockroach from a female cockroach [2018]

1 Presence of a boat-shaped sternum on the 9th abdominal segment

2 Presence of caudal styles

3 Forewings with darker tegmina

4 Presence of anal cerci

Ans.
(2)

Male cockroach bears a pair of short thread-like anal/caudal styles which are absent in females. They project backward from the sides of the 9th abdominal segment in male cockroaches.

Solution

Q.
Which of the following features is used to identify a male cockroach from a female cockroach [2018]

1 Presence of a boat-shaped sternum on the 9th abdominal segment

2 Presence of caudal styles

3 Forewings with darker tegmina

4 Presence of anal cerci

Ans.
(2)

Male cockroach bears a pair of short thread-like anal/caudal styles which are absent in females. They project backward from the sides of the 9th abdominal segment in male cockroaches.

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Solution

Q. Which of the following features is used to identify a male cockroach from a female cockroach [2018]

1 Presence of a boat-shaped sternum on the 9th abdominal segment

2 Presence of caudal styles

3 Forewings with darker tegmina

4 Presence of anal cerci

Ans. (2) Male cockroach bears a pair of short thread-like anal/caudal styles which are absent in females. They project backward from the sides of the 9th abdominal segment in male cockroaches.

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Q.
Which of the following features is used to identify a male cockroach from a female cockroach [2018]

Ans.
(2)

Male cockroach bears a pair of short thread-like anal/caudal styles which are absent in females. They project backward from the sides of the 9th abdominal segment in male cockroaches.