Transcript Kingdom Protista

KINGDOM PROTISTA
Packet #66
Chapter #28
Monday, July 20, 2015
CHARACTERISTICS
 Unicellular,
or simple multicellular
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© Ryan Barrow 2008
eukaryotes
 Heterotrophic or autotrophic
 Most are aquatic and may compose
plankton
 Reproduction ranges from asexual to
sexual modes
HW

Syngamy
 Include
protozoa, algae, slime molds and
water molds
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ECOLOGICAL ROLE
Protozoa are an
important part of
zooplankton.
 Algae are important
producers
(autotrophs)
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© Ryan Barrow 2008

Especially in marine
and freshwater
ecosystems
Important source of
oxygen
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“EVOLUTIONARY” CONNECTION

© Ryan Barrow 2008
Zooflagellates, such as
Giardia, may be more
closely related to
prokaryotes than any
other protist group
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“EVOLUTIONARY” CONNECTION

Endosymbiotic Theory
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Apicomplexans are parasites, and nonphotosynthetic, but
have a chloroplast “relic” from secondary endosymbiotic
events
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© Ryan Barrow 2008
Describes the origin of chloroplasts from photosynthetic
prokaryotes and mitochondria from aerobic bacteria
An apicomplexan causes malaria and a chemical that inhibits
chloroplasts may be useful in treatment.
Electron microscopy evidence suggests protists
are monophyletic but most biologists regards
protists as paraphyletic based on structures and
molecular data
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THE GOOD

Red Algae
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© Ryan Barrow 2008
Agar and carageenan
are commercial
products derived from
red algae
Cell walls often have
thick sticky
polysaccharides
Coralline red algae are
important in building
coral reefs
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THE GOOD II

Brown Algae
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© Ryan Barrow 2008
Algin is commercial
product derived from
brown algae
HW
 Where is algin used?
Source of food—
particularly in Asian
countries
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THE BAD

The Red Tide
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© Ryan Barrow 2008
Caused by
dinoflagellates
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THE UGLY

Malaria
Caused by
Plasmodium
falciparum
 Could be fatal if
untreated
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© Ryan Barrow 2008
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PRINCETON REVIEW BOOK
Princeton Review

Students are to
memorize the
different phyla of
Kingdom Protista on
pages 129 & 130
Amoeba