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

SAI International School
Subject- Biology, Class-IX
Chapter- Diversity in living organisms
Module 26

Expt.No-5

Aim- To study the characteristics of Spirogyra, Agaricus, Moss/Fern, Pinus (either
with male or female cone) and an Angiospermic plant.

PROCEDURE

1. Observe the permanent slide of Spirogyra under low power of microscope and
record your observation. Draw a well labelled diagram.
2. Observe the given specimens carefully. Note the characteristics of each
specimen. Draw well labelled diagram of each specimen.

OBSERVATIONS:
1. Spirogyra (Pond silk)
Identifying Features

1. The plant body is filamentous.
2. Its filaments are long, multicellular and unbranched.
3. Each filament comprises of long, cylindrical cells which are arranged end to
end. Cells are generally longer than being broader.

4. Cytoplasm is present in the form of strands which enclose a large nucleus.
5. Chloroplasts are flat, spiral and ribbon-shaped. It contains starch containing
pyrenoids, placed equidistant from each other.
6. A large central vacuole is present in each cell.

2. Agaricus (Mushroom)
Identifying Features

1. It is the fruiting body of Agaricus.
2. It is macroscopic, umbrella-shaped and fleshy.