Diversity In Living Organisms — Science STD 9 — Question

Plant bodies which are commonly named as “cryptogamae” are:

1. Thallophyta.
2. Bryophyta.
3. Pteridophyta.

Characteristics of these plant bodies are:

1. Thallophyta:

• Plants have an irregular shaped undifferentiated body called thallus.
• Vascular tissues are absent.

2. Bryophyta:

• The plant body is commonly differentiated to form stem and leaf-like structures.
• There is no specialised tissue for the conduction of water and other substances from one part of the plant body to another.

3. Pteridophyta:

• The plant body is differentiated into roots, stem and leaves.
• These plants have specialised tissue for the conduction of water and other substances from one part of the plant body to another.