Question

Which of the following about Pheretima is incorrect ?

• A. Genital papillae are present on ${17}^{th}$ and ${19}^{th}$segment
• B. Male genital pores are present on ${18}^{th}$ segment
• C. Clitellum is present on segments 24, 25 and 26
• D. Segments of earthworm are called somites

Answer 1

Answer: (C)

Clitellum is present on segments 24, 25 and 26

Pheretima is a genus of earthworm and their body consists of about 100-120 small ring-like segments called or somites or metameres. All the segments are alike except for the first and last ones. Further, in a mature earthworm, there exists a band of glandular tissue known as the clitellum. This is present on segments 14 to 16 and forms a girdle around these and secrete mucous and albumen. Thus, the correct answer is option C.