the amoeba is a very common type of protozoan trypanosoma is a flagellate type of protozoan and...
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ProtozoaBy: Rukesh Chinthapatla & Udara Fernando
The amoeba is a very common type of protozoan
Trypanosoma is a flagellate type of protozoan and causes sleeping sickness
A flagellate protozoan. Can you see the flagella?
Facts about protozoa:• Are protists• Lives mostly as a heterotrophic organism; most eat bacteria or other protozoa, but a few can take in nutrients dissolved in water• Do well in wet environments• Though only a few percentage of protozoa are parasites, they cause some of the most harmful diseases• The four most groups are flagellates, amoebas, apicomplexans, and ciliates
RhizopodaCommonly called amoebasDoes not really possess a defined structure
although some do live inside a protein shellCharacterized by pseudopodia, or “fake
feet”Pseudopodia are used for movement as
well as capturing food; http://www.youtube.com/watch?v=W6rnhiMxtKU
Include various organisms; from amoebas to slime molds
Found in freshwater and marine habitatsSince there is a lot of variety, reproduction
is varied; some reproduce by binary fission and some using spores
Rhizopoda can often be classified by the shape and structure of the pseudopods
A rhizopod, also known as an amoeba.
RadiolariansAre amoeboid protozoa Have detailed skeletons; with inner
(endoplasm) and outer (ectoplasm) parts
Skeletons are usually fused into one beautiful piece
Possess many pseudopodia that look like needles
Use their buoyancy in coasting ocean currents to move around
Reproduce both sexually and asexuallyHeliozoansVery similar to radiolariansSkeleton consists of glassy plates that
are not fused Circular amoeboid with pseudopods
around the body (appearing like a sun)Differ from radiolarians in that their
skeleton is not as complex
A radiolarian, with many pseudopodia at the bottom
Heliozoans have a similar appearance to the sun
Both radiolarians and heliozoans are referred to as actinopods, due to slender pseudopodia
AmoebaCommon type of protozoaDoesn’t really possess any definite shape and are
very flexible as a resultUses pseudopodia to move and eat;
http://www.youtube.com/watch?v=7pR7TNzJ_pA&feature=related
Live in freshwater and saltwater and can be parasites
Also have endoplasm and ectoplasm
Amoebas don’t have a definite structure
Paramecium Are a ciliate protozoa, using cilia for
movement and eating Are oval-like and possess slipper
shape Found in fresh water environments
(warm waters) Are covered in cilia, food travels along
cilia into the oral groove Have two types of nuclei; large
macronucleus and then 80 tiny diploid nuclei used in sexual reproduction
Paramecium are unicellular protists capable of both sexual and asexual (binary fission; more common) reproduction
Asexual reproduction occurs when the organism’s macronucleus elongates and splits
The complex sexual mixing of genes in paramecium happens during conjugation, the numerous tiny nuclei undergo meiosis in this process
Paramecium eat microorganisms such as algae, bacteria, and yeast
The structure of paramecium
Paramecium- Conjugation
ForaminiferansAlso have pseudopodia for movement, feeding, and shell
formationAre almost all marine, living in the sand or attached to
rocks and algae, or even present in planktonNamed for their porous shells made of calcium carbonateVery large animals, shells can grow up to 1 inch long
Notice the porous skeleton in this foraminifera
Foraminiferans
A foraminifera fossil, which are very useful and important in dating sedimentary rocks
•When the foraminiferans die, the shells drop to the bottom and the calcium carbonate forms calcareous ooze•The calcareous ooze has settled to the bottom of the sea forming much of the sediment found on the ocean floor, forming much of the sedimentary rocks in the earth. •Foraminiferans leave fossils that can be used to correlate the ages of sedimentary rocks!•Study of fossil foraminiferans has been extremely important in recognizing geological strata and for dating deposits•The oil industry relies heavily on these microfossils to find potential oil deposits