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 Movement – use of flagellum - can also move by changing it’s shape in a process called “euglenoid” movement

Euglena Food – Photosynthetic 6CO2 + 6H2O C6H12O6 + 6O2 Euglena can switch to being heterotrophic if they can’t find any light (now that’s cool!)

Euglena Reproduction – Asexual binary fission Special Structures Flagellum – locomotion Chloroplasts – site of photosynthesis Eye spot – light sensitive pigment

Euglena

Spirogyra Spirogyra ternatum Division Chlorophyta Movement – sessile Food – Photosynthesis (You write the equation)

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 The zygote becomes protected by a Zygospore Eventually the zygote divides by meiosis to produce more haploid cells

Spirogyra Special structures Conjugation tube Spiraling chloroplast Zygote Zygospore

Spirogyra

Other Phytoplankton Volvox – Division Chlorophyta

Other Phytoplankton Diatoms – Division Chrysophyta

Mycoplankton Fungus-like Protists Slime molds Colonial organisms Terrestrial decomposers

Slime Molds