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bio protists
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what are the main characteristics of protists?
-eukaryotic
-unicellular
-solitary or colonial
-1.5 billion years old
difficult to classify
How did protists evolve?
first protists came from symbiosis (both species benefit)
-have similar organelles to prokaryotes
what are endosymbionts?
organisms that live in a host organism
what are the four animal-like phyla for protists?
Ciliophora
Zoomastigina
Sporozoa
Sarcodina
characteristics of ciliophora?
common names
: ciliates
cilia for movement
found in fresh + salt water
free living
how do ciliates (paramecium) feed?
-cilia force water into gullet
-food then forced into vacuoles
-vacuoles moved moved to cytoplasm and fuse w/ lysosomes for digestion
-waste out anal pore
what are the two ways ciliates reproduce?
Binary Fission
conjugation
why is conjugation sexual?
genetic info exchanged...genetic diversity
what are the 4 pathogens and their species?
Taxoplasmosis - sporozoa
Giardia lamblia - zoomastigina
African sleeping sickness - zoomastigina
Malaria(plasmodium) - sporozoa
What is the host of taxoplasmosis?
cats
symptoms of plasmosis?
weakened immune system
How is giardia lamblia contracted?
contamintaed water or food
what is the vector and symptoms of african sleeping sickness?
tsetse fly
-effects immune system
-lose control of muscles
-uncontrollable sleepiness
what are the 5 other phyla of protists?
euglenophyta
pyrophyta
chrysophyta
ascarasiomycota
myxomycota
characteristics of zoomastigina:
common name
: Flagellates
role
: symbionts/parasite
features
: flagella for movement
reproduction: sexual/asexual
characteristics of sporozoa
common name
: sporozoans
-parasitic
-spores for reproduction
-non motile
characteristics of sarcodina:
role
: symbionts
feature
: pseudopods for movement +feeding
repro
: binary fission
characteristics of euglenophyta:
"euglenas"
-freshwater
-producer
-flagella
-choloroplasts
asexual
charac of pyrophyta
"dinoflagellates"
-photosynthetic
-free living
-luminescent
- surrounded by thick plates
asexual
chrysophyta:
"chrysophytes"
free living
photosynthetic
cell walls, glasslike rich in silicon
charac. of ascarasiomycota
"cellular slime molds"
-decomposer
produce spores by mitosis
acts multicellular
charac of myxomycota:
"acellular slime molds"
free living
produce spore by meiosis
produce diploid ameboid cells, fuse, repeat cycle.
Author
alexa-128
ID
56370
Card Set
bio protists
Description
bio protists
Updated
2010-12-16T00:47:59Z
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