Q.What is botryoidal tissue?

Annelids are true segmented worms, showing metamerism — repeated body segments each with its own muscles, ganglia and excretory organs — and a true, spacious coelom acting as a hydrostatic skeleton.

Three classes: Polychaeta (numerous setae on paddle-like parapodia used for locomotion, e.g. Nereis), Oligochaeta (few setae, no parapodia, hermaphroditic, direct development — includes the earthworm Pheretima), and Hirudinea (leeches — anterior/posterior suckers, reduced/absent setae and coelom, hermaphroditic, ecto-parasitic/predatory, e.g. Hirudo). …