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In earthworm, copulatory papillae are present on segment |
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a) |
17th to 19th |
b) |
19th to 21st |
c) |
21st to 23rd |
d) |
23rd to 25th |
|
In earthworm, copulatory papillae are present on segment |
|||||||
|
a) |
17th to 19th |
b) |
19th to 21st |
c) |
21st to 23rd |
d) |
23rd to 25th |
(a)
In the line with male genital pores, the 17th-19th segments bear a pair of papillae each. These are called copulatory papillae. Each papilla has shallow, cup like pit and bears fine aperture of accessory glands