Wize High School Grade 11 Biology Textbook > Protists & Fungi [Under construction]
Multicellular Protists
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Multicellular Protists
This is when we start to see more complex cells with larger structures!
Brown Algae
- Seaweed
- Large multicellular algae with complex structure
- Cell walls filled with algin: gel-like substance Examples:
- Thickening agent,
- waterproof and fireproof fabric
Archaeplastids
- Viewed as "ancient chloroplasts"
- Likely the endosymbiont that absorbed a photosynthetic Cyanobacteria, enabling it to use photosynthesis
Red Algae
- Pigment turns it red, masking the green chlorophyll
- Contains the multicellular seaweeds
Green Algae
- Chlorophytes
- Chlorophyll produces green pigment
- Most inhabit fresh water
- Contains both unicellular and multicellular species
- multicellularity allows for division of labor
- Charophytes
- Complex, multicellular organisms
- Closely related to land plants (sister taxa)
- Freshwater algal blooms
- Eutrophication: too many nutrients
- Caused by chemical and animal runoff
- Occurs in warm water
- When algal bloom dies it creates a mat
- aerobic bacteria decompose the dead algae and consume all the oxygen in the water
- kills other aquatic organisms
Other Groups
- Other multicellular protists
- Rhizaria
- Unikota
Practice: Protists
Which multicellular protists are considered "ancient chloroplasts"?
Practice: Protists
Which of the following is FALSE about eutrophication?
Practice: Protists
Which group of algae produces the gel-like substance algin?