Animal Classification - Phylum Annelida

Question 1

Physical characteristics of an earthworm

Answer 1

Segmented body 
Rounded in cross-section 
Body cavity 
Bristles known as setae 
Hermaphrodites

Question 2

Locomotion of earthworms

Answer 2

• Move by peristalsis, body contracts and expands shortening and lengthening as it moves
• The setae allow anchoring of the body

Question 3

Benefits of earthworms

Answer 3

*Convert organic matter into humus, improves soil fertility.
*Improve soil structure through burrowing by creating channels that improve and aid aeration and drainage
*Mix layers of soil by bringing organic matter to deeper levels through burrowing
(Especially the tiger worm)

Question 4

This phylum consists of a large group of segmented worms

Answer 4

Phylum Annelida