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Plant-like Protists. Phytoplankton All are photosynthetic Sessile algae Are classified according to their unique characteristics. Phytoplankton. We will study 2 plant-like protists: Euglena (flagellate) Spirogyra (sessile algae). Euglena. Euglena gracilis Division Euglenophyta

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plant like protists

Plant-like Protists

Phytoplankton

All are photosynthetic

Sessile algae

Are classified according to their unique characteristics

phytoplankton
Phytoplankton
  • We will study 2 plant-like protists:
  • Euglena (flagellate)
  • Spirogyra (sessile algae)
euglena
Euglena
  • Euglena gracilis
  • Division Euglenophyta
  • Movement – use of flagellum
          • - can also move by changing it’s shape in a process called “euglenoid” movement
euglena1
Euglena
  • Food – Photosynthetic
    • 6CO2 + 6H2O C6H12O6 + 6O2
    • Euglena can switch to being heterotrophic if they can’t find any light (now that’s cool!)
euglena2
Euglena
  • Reproduction – Asexual binary fission
  • Special Structures
  • Flagellum – locomotion
  • Chloroplasts – site of photosynthesis
  • Eye spot – light sensitive pigment
spirogyra
Spirogyra
  • Spirogyra ternatum
  • Division Chlorophyta
  • Movement – sessile
  • Food – Photosynthesis
  • (You write the equation)
spirogyra1
Spirogyra
  • Reproduction – filaments of spirogyra line up and connect with conjugation tubes.
  • All the contents of the donor cell pass through the tube into the recipient cell
  • The donor cell is now a dead, empty cell
  • Since the filamentous cells are considered haploid (n), the recipient cell is now considered a zygote (2n)
conjugation continued
Conjugation continued
  • The zygote becomes protected by a Zygospore
  • Eventually the zygote divides by meiosis to produce more haploid cells
spirogyra2
Spirogyra
  • Special structures
  • Conjugation tube
  • Spiraling chloroplast
  • Zygote
  • Zygospore
other phytoplankton
Other Phytoplankton
  • Volvox – Division Chlorophyta
other phytoplankton1
Other Phytoplankton
  • Diatoms – Division Chrysophyta
mycoplankton
Mycoplankton
  • Fungus-like Protists
  • Slime molds
  • Colonial organisms
  • Terrestrial decomposers
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