Algae Notes by fjzhangxiaoquan

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									     Biology 101
Unit 3B: Microbial Life
       Day Six
       Mrs. Caylor
                Journal 6
• Why is it so important to control the
  mosquito population?

• Why is it considered a benefit for some
  people in mosquito-ridden areas to have
  sickle cell anemia???
      Describe the characteristics of
                  algae.
• Algae: members of protist kingdom
  classified by color
• Algae form the base of the aquatic
  food chain as phytoplankton
• Algae produces much of the Earth’s
  oxygen
• Algal blooms (masses of algae) may
  indicate increase in wastes in water,
  deplete water of nutrients
• Uses of algae: medications for
  ulcers, high blood pressure, arthritis,
  foods such as sushi wrappings, ice
  cream, salad dressing, syrup
Describe the types of algae.
               •   Euglenophyta:
                   Example euglena
               •   Has traits of plants:
                   cell wall &
                   chlorophyll
               •   Has traits of
                   animals: move with
                   flagella, respond to
                   light with eyespot
     Types of algae.
• Phylum dinoflagellata:
  Dinoflagellates
• Have two or more
  flagella
• Several produce
  toxins when they
  bloom
• Causes red tides:
  these blooms kill fish
    Types of algae
• Phylum Bacillariophyta:
  Diatoms
• Marine autotrophs eaten by
  many other marine animals
• Have glassy shells,
  harvested to use in abrasive
  cleaners, was used for
  toothpaste
• Store oils giving fish a strong
  “fishy” taste when they eat
  them
    Types of algae
• Phylum Rhodophyta: red
  algae
• Marine seaweed
• Attach to rocks at bottom of
  ocean

• Phylum Phaeophyta: brown
  algae
• Most are marine
• Commonly called kelp
• Grown in kelp “beds”
  providing shelter for fish
  Types of algae
• Phylum Chlorophyta: Green
  algae
• Contain chloroplasts which are
  filled with chlorophyll
• Undergo photosynthesis
• Usually found in freshwater
  near the surface
• Some have special adaptations
  for floating called air bladders
• Wide variety of forms:
  filaments, sheets, spherical,
  and colonies
                   Quiz 6
1. Which algae type is commonly called kelp?
   a. brown     b. green. c. red
2. Which algae have chlorophyll and are usually
    found in freshwater?
   a. brown b. green       c. red
3. Which algae have glassy shells and no
    flagella?
    a. brown b. diatoms c. dinoflagellates
4. Which algae produce toxins when they bloom
    causing red tides?
     a. diatoms b. dinoflagellates c. red
5. How are algae classified?
    a. shape     b. pigment c. movement

								
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