2. Objectives
• General information about algae.
• Explain the general characteristics of algae.
• Describe the various body structure of algae.
3. What is algae?
Algae are plantlike organisms
Belong to kingdom Protista
They are doing photosynthesis
The body portion of an algae is called thallus
4. Characteristics
• Algae are a diverse group of Protists.
• Range from microscopic single-cell organisms to a
large seaweeds that may be hundreds of feet long.
• Unlike protozoa algae are autotrophic protists.
• They have chloroplasts and produce their own
carbohydrates by photosynthesis
• Most of algae are aquatic and have flagella at
some point of their life-cycle
• In addition algae cells often contain pyrenoids.
5. structure
• Based on the structure of algae 4 types are
recognized.
1. Unicellular algae
2. Multicellular algae
3. Colonial algae
4. Filamentous algae
6. Unicellular algae
• Consist of one cell
• Most of them aquatic that compose the
phytoplankton.
• Phytoplankton: a population of photosynthetic
organisms.
7. phytoplankton
• phytoplankton produce almost half of the
world carbohydrates
• Provide huge amount of nutrients for aquatic
organism.
• Also produce oxsygen