28.3
A phylogenetic
hypothesis of
eukaryotes
(see book page 578)
28.12. Stramenopile flagella
Powdery mildew
28.17. The life cycle of a water mold
28.17. The life cycle of a water mold
28.17. The life cycle of a water mold
Zoospore release
Water mold: Oogonium
28.3
A phylogenetic
hypothesis of
eukaryotes
(see book page 578)
Absorption spectra for different algal pigments
28.3. Diatoms: Diatom diversity (left), Pinnularia (left)
Diatom shell
28.13. Freshwater diatoms (colorized SEM)
Diatoms (Bacillariophyta)
Cyclotella
Navicula
You are given an unknown organism to identify.
It is unicellular and heterotrophic. It is motile, with
well-developed organelles and two nuclei, one large
and one small. You conclude that this organism is
most likely a member of which major group?
A. diatoms
B. amoebozoans
C. red algae
D. ciliates
E. water molds (oomycetes)
28.3
A phylogenetic
hypothesis of
eukaryotes
(see book page 578)
Yellow (carotene) and
brown (xanthophyll)
pigments
28.14. Dinobryon.
A colonial, freshwater
golden alga
28.15. Brown Algae: Kelp forest
Kelp forest
28.16. The life
cycle of Laminaria:
an example of
alternation of
generations
28.26. The life
cycle of Laminaria:
an example of
alternation of
generations
Isomorphic alternation of generations
Heteromorphic alternation of generations
28.3
A phylogenetic
hypothesis of
eukaryotes
(see book page 578)
Protistan
Diversity
(see book
p. 598)
28.3
A phylogenetic
hypothesis of
eukaryotes
(see book page 578)
Chlorarachniophytes
Acquired chloroplasts via
secondary endosymbiosis
28.3. Foraminiferan (forams) will snail-like shell and threadlike pseudopodia
Calcium carbonate shells
radiolarians
Radiolarian skeleton
Silica shells
28.3
A phylogenetic
hypothesis of
eukaryotes
(see book page 578)
Absorption spectra for different algal pigments
28.20. Red algae: Rhodophyta
Chromatic adaptation
28.20.
Edible seaweed
(red algae)
28.3
A phylogenetic
hypothesis of
eukaryotes
(see book page 578)
28.21 Colonial and multicellular chlorophytes: Volvox (left),
Caulerpa (middle) and Ulva (right)
28_03dVolvoxDaughter_SV.mpg
Spirogyra conjugating
28.22. The life cycle of Chlamydomonas: Example of isogamy
28.3
A phylogenetic
hypothesis of
eukaryotes
(see book page 578)
Amoeba
pseudopodium
Amoebas: Use of pseudopodia for feeding
28.3
A phylogenetic
hypothesis of
eukaryotes
(see book page 578)
28.24. Plasmodial slime mold
28.24. The life cycle of a plasmodial slime mold, such as Physarum
Slime mold Sporangia
28.25 The life cycle of a cellular slime mold (Dictyostelium)
Dictyostelium life cycle
28.27. Protists play key roles in ecological relationships
(and in public health)
Protists are key
producers in aquatic
communities. Up to
25% of the world’s
photosynthesis is
performed by protists.
Organisms in aquatic
communities depend
on photosynthetic
protists for food
28.7. Protists play key roles in ecological relationships
(and in public health)
High water temperatures
(global warming) and
pollution cause corals to
expel their symbiotic
dinoflagellate protists
This results in coral
bleaching and,
eventually coral death
28.7. Protists play key roles in ecological relationships
(and in public health)
Some examples of parasitic Protists
Entamoeba histolytica
Entamoeba coli
Entamoeba gingivalis
Endolimax nana
Iodamoeba butschlii
Naegleria fowleri
Giardia lamblia (intestinalis)
Chilomastix mesnili
Trichomonas vaginalis
Leishmania donovani
Leishmania tropica
Leishmania braziliensis
Trypanosoma gambiense and rhodesiense (African
trypanosomiasis)
Trypanosoma cruzi (American trypanosomiasis)
Plasmodium spp. (Malaria)
Toxoplasma gondii
Pneumocystis carinii
CryptosporidiumSpp spp.
Balantidium coli
Entamoeba histolytica (amebic dysentery)
Summary
of key
concepts
(see book p.
598-599)
Each of the following groups includes
many planktonic species EXCEPT
A. golden algae.
B. forams (foraminiferans).
C. dinoflagellates (Pyrrhophyta).
D. kinetoplastids.
E. diatoms.