Page 1 - 3.Home assignment II(Expt&Activity)

SAI International School
Subject- Biology, Class-IX
Chapter- Diversity in living organisms
Module -29

Expt.No-6

Aim- To observe identifying features and draw the given specimens – earthworm,
cockroach, bony fish and bird.

PROCEDURE

1. Observe carefully the preserved specimen.
2. Note the characteristics of organisms.
3. Draw well labelled diagrams in practical notebook.

OBSERVATIONS:

1. EARTHWORM (Pheretima)------It belongs to phylum Annelida.

FEATURES OF THE PHYLUM

1. The body of the animal is divided into segments (internally and externally)
called metameres.
2. Chitinous setae which act as locomotory organ are present.

Specimen Features
Earthworm lives inside a burrow in the soil. It has following adaptations:

1. Its body is cylindrical and elongated.
2. It feeds on soil or humus and excretes fine soil and undigested material as
ring-shaped castings through anus. This helps in making burrows.
3. Skin is always kept moist with the help of mucus glands.