Objectives: 1) Draw a picture and provide
a 1 sentence description for each of the
types of microscopic algae. 2) Provide an
example of a multicellular plant-like protist.
http://www.visualsunlimited.com/images/watermarked/416/416688.jpg
2 TYPES OF PLANT-LIKE PROTISTS
#1 MULTICELLULAR ALGAE
* HAVE LEAVES.
* LACK STEMS AND ROOTS.
* DIFFERENT ALGAE HAVE DIFFERENT
PHOTOSYNTHETIC PIGMENTS.
#2 PHYTOPLANKTON
* SINGLE-CELLED
* PHOTOSYNTHETIC.
* VERY IMPORTANT FOR AQUATIC FOOD
CHAINS.
THERE ARE 3 TYPES OF PHYTOPLANKTON
#1 EUGLENOIDS (Euglenophyta)
* LIKE A PLANT IN THAT THEY CONTAIN
CHLOROPHYLL FOR PHOTOSYNTHESIS.
* LIKE AN ANIMAL IN THAT THEY CAN:
1)MOVES AROUND USING 1 TO 3 FLAGELLA
LOCATED ON THE HEAD.
2) POSSESS AN EYESPOT.
2) EAT FOOD IF NO LIGHT IS AVALABLE
FOR PHOTOSYNTHESIS.
1
#2 DIATOMS (Bacillariophyta)
* SINGLE-CELLED
* HAVE SHELLS CALLED TESTS MADE OF
GLASS-LIKE SILICATE.
* PHOTOSYNTHETIC
* SHELLS ARE GEOMETRICALLY SHAPED.
* REPRODUCE ASSEXUALLY FOR MANY
GENERATIONS BEFOREREPRODUCING
SEXUALLY.
2
#3 DINOFLAGELLATES (Dinoflagellata)
* SINGLE-CELLED
* HAVE THICK CELLULOSE ARMOR.
* HAVE 2 FLAGELLA . One flagella is
posterior while the other is on the
“midsection”.
* LIVE IN AQUATIC HABITATS.
#4 Golden Algae (Chrysophyta)
•Golden in color.
•Have one or two flagella on the head.
3
MULTICELLULAR ALGAE GREEN ALGAE
- SINGLE AND MULTICELLED. ALL SMALL.
- MAJOR PIGMENT: CHLOROPHYLL
- MOST LIVE IN FRESHWATER
- SOME LIVE ON SOIL AND TREE TRUNKS.
BROWN ALGAE
-SINGLE AND MULTICELLED.
- MOST BROWN ALGAE LIVE IN SALT WATER.
- CONTAINS GREEN AND YELLOW-BROWN
PIGMENTS.
- EXAMPLE: KELP AND SARGASSO SEAWEED.
RED ALGAE
- MULTICELLULAR
- GROWS MAINLY IN TROPICAL OCEAN
WATERS OR ALONG ROCKY COASTS.
- CONTAINS RED AND BLUE PIGMENTS.
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