plant-like protists phytoplankton all are photosynthetic sessile algae are classified according...
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Plant-like ProtistsPlant-like Protists
PhytoplanktonPhytoplankton All are photosyntheticAll are photosynthetic Sessile algaeSessile algae Are classified according to Are classified according to their unique characteristicstheir unique characteristics
PhytoplanktonPhytoplankton
We will study 2 plant-like protists:We will study 2 plant-like protists:
1.1. Euglena (flagellate)Euglena (flagellate)
2.2. Spirogyra (sessile algae)Spirogyra (sessile algae)
EuglenaEuglena
Euglena gracilisEuglena gracilis Division EuglenophytaDivision Euglenophyta
Movement – use of flagellumMovement – use of flagellum - - can also move by changing can also move by changing
it’s shape in a process called it’s shape in a process called “euglenoid” movement“euglenoid” movement
EuglenaEuglena
Food – PhotosyntheticFood – Photosynthetic– 6CO6CO2 2 + 6H+ 6H22O O CC66HH1212OO6 6 + 6O+ 6O22
– Euglena can switch to being Euglena can switch to being heterotrophic if they can’t find any light heterotrophic if they can’t find any light (now that’s cool!)(now that’s cool!)
EuglenaEuglena
Reproduction – Asexual binary Reproduction – Asexual binary fissionfission
Special Structures Special Structures
1.1. Flagellum – locomotionFlagellum – locomotion
2.2. Chloroplasts – site of Chloroplasts – site of photosynthesisphotosynthesis
3.3. Eye spot – light sensitive pigmentEye spot – light sensitive pigment
EuglenaEuglena
SpirogyraSpirogyra
Spirogyra ternatumSpirogyra ternatum Division ChlorophytaDivision Chlorophyta
Movement – sessileMovement – sessile
Food – PhotosynthesisFood – Photosynthesis (You write the equation) (You write the equation)
SpirogyraSpirogyra
Reproduction – filaments of spirogyra line Reproduction – filaments of spirogyra line up and connect with up and connect with conjugation tubes. conjugation tubes.
All the contents of the All the contents of the donordonor cell pass cell pass through the tube into the through the tube into the recipientrecipient cell cell
The donor cell is now a dead, empty cellThe donor cell is now a dead, empty cell Since the filamentous cells are considered Since the filamentous cells are considered
haploid (n), the recipient cell is now haploid (n), the recipient cell is now considered a zygote (2n) considered a zygote (2n)
Conjugation continuedConjugation continued
The zygote becomes protected by a The zygote becomes protected by a ZygosporeZygospore
Eventually the zygote divides by Eventually the zygote divides by meiosis to produce more haploid meiosis to produce more haploid cellscells
SpirogyraSpirogyra
Special structures Special structures
1.1. Conjugation tubeConjugation tube
2.2. Spiraling chloroplastSpiraling chloroplast
3.3. ZygoteZygote
4.4. Zygospore Zygospore
SpirogyraSpirogyra
Other PhytoplanktonOther Phytoplankton
Volvox – Division ChlorophytaVolvox – Division Chlorophyta
Other PhytoplanktonOther Phytoplankton
Diatoms – Division ChrysophytaDiatoms – Division Chrysophyta
MycoplanktonMycoplankton
Fungus-like ProtistsFungus-like Protists
Slime moldsSlime molds
Colonial organismsColonial organisms
Terrestrial decomposersTerrestrial decomposers
Slime MoldsSlime Molds