Eduprobe
Question:
Position of testis in Periplaneta americana
7th,8th.9abdominal segments
8th,9th,10tabdominal segments
4th,5th,6tabdominal segments
5th,6thabdominal segments
Solution:
Correct option is B. 4th,5th,6th abdominal segments. Cockroaches are dioecious and both sexes have well developed reproductive organs. The male reproductive system consists of a pair of testes one lying on each lateral side in the 4th - 6th abdominal segments. From each testis arises a thin vas deferens which opens into the ejaculatory duct through seminal vesicle. Hence, the Position of testis in Periplaneta americana is 4th,5th,6th abdominal segments. So, the correct answer is '4th, 5th, 6th abdominal segments'.