A) 7 and 9
B) 18 and 19
C) 14 and 15
D) 12 and 13
Correct Answer: D
Solution :
Blood vascular system of earthworm (Pheretima posthuma) is closed type. Blood is red in color as haemoglobin is dissolved in blood plasma. The important transverse vessels in first 13 segments are lateral hearts (segments 7 and 9), Anterior loops (segments 10 and 11) and lateral oesophageal hearts (segments 12 and 15). - Clitellum is present on 14, 15 and 16th segments of body. - Male genital papillae are present on segments 17 and 19 whereas the male genital pore on segment 18th.
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