protozoa by rukesh chinthapatla udara fernando n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Protozoa By: Rukesh Chinthapatla & Udara Fernando PowerPoint Presentation
Download Presentation
Protozoa By: Rukesh Chinthapatla & Udara Fernando

Loading in 2 Seconds...

play fullscreen
1 / 8

Protozoa By: Rukesh Chinthapatla & Udara Fernando - PowerPoint PPT Presentation


  • 470 Views
  • Uploaded on

Trypanosoma is a flagellate type of protozoan and causes sleeping sickness . Protozoa By: Rukesh Chinthapatla & Udara Fernando. The amoeba is a very common type of protozoan. Facts about protozoa: Are protists

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Protozoa By: Rukesh Chinthapatla & Udara Fernando' - nonnie


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
protozoa by rukesh chinthapatla udara fernando

Trypanosoma is a flagellate type of protozoan and causes sleeping sickness

ProtozoaBy: Rukesh Chinthapatla & Udara Fernando

The amoeba is a very common type of protozoan

  • 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

A flagellate protozoan. Can you see the flagella?

rhizopoda
Rhizopoda
  • Commonly called amoebas
  • Does not really possess a defined structure although some do live inside a protein shell
  • Characterized 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 habitats
  • Since 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.

slide3

Both radiolarians and heliozoans are referred to as actinopods, due to slender pseudopodia

  • Radiolarians
  • Are 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 asexually
  • Heliozoans
  • Very similar to radiolarians
  • Skeleton 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

slide4

Amoeba

  • Common type of protozoa
  • Doesn’t really possess any definite shape and are very flexible as a result
  • Uses 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
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

foraminiferans
Foraminiferans
  • Also have pseudopodia for movement, feeding, and shell formation
  • Are almost all marine, living in the sand or attached to rocks and algae, or even present in plankton
  • Named for their porous shells made of calcium carbonate
  • Very large animals, shells can grow up to 1 inch long

Notice the porous skeleton in this foraminifera

foraminiferans1

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
Foraminiferans

A foraminifera fossil, which are very useful and important in dating sedimentary rocks