CBSE Class 9 Answered

Characteristics of Division Thallophyta:

• Small-sized and grow in moist places.
• Have an irregularly shaped, undifferentiated plant body called thallus.
• Have a cell wall made of cellulose.
• Have green pigment chlorophyll, but some may also have red or brown pigments.
• Autotrophic in nature and the reserve food material is generally starch.
• Do not have a vascular system.
• Asexual reproduction occurs through spore formation, while sexual reproduction occurs through conjugation.

Uses:

• Often used as food.
• Used to obtain a gelling agent.
• Source of biofuels.
• Rich sources of vitamins and minerals.
• Pigments obtained from algae can be used as natural dyes.

Examples:

• Nostoc
• Oscillatoria
• Spirulina
• Chara
• Chlamydomonas
• Spirogyra