Bio1151b
Chapter
28
Protists
The kingdom formerly known as
is crumbling. Protists are more
diverse
than any other eukaryotes and consist of
as well as
organisms.
In the food web, protists can be
, which contain chloroplasts,
, which absorb or ingest food, or a
combination
called
.
Much of protist
diversity
has its origins in serial
endosymbiosis.
Euglenozoa,
such as
Euglena,
contain a crystalline
rod
inside their
.
Dinoflagellates
are photosynthetic and often contain internal
plates
of
; two
propel them through water in a spinning motion.
Ciliates
use
to move and feed. An
example
is
Paramecium,
which can undergo genetic recombination by
conjugation.
Golden
algae
(
) can be unicellular or colonial and contain yellow and brown
for photosynthesis.
Brown
algae (
), are multicellular
"seaweeds"
that include
Giant
which forms aquatic "forests", and
Weed
which has air bladders to help it float.
An innovation among the multicellular algae is the
of
generations.
Red algae and green algae are the closest
relatives
of land plants.
Red
algae (
) contain the pigment
, which masks the green of
. Some are multicellular, edible
"seaweeds".
Green
algae (
) contain
that give them their green color. The
can live
symbiotically
with
fungi
as
.
Review.