1. Plant-Like & Fungus-Like Protists
Unit 6 – Lecture 3

2. Algae – an Introduction
Alga – plant like protist – plural, algae
unicellular or multicellular
major producer of world’s oxygen
sexual or asexual reproduction or both
alternation of generations
autotrophic – photosynthetic

3. Algae – An introduction
Six Phyla of Algae
Euglenophyta
Bacilliarophyta
Dinoflagellata
Chlorophyta
Rhodophyta
Phaeophyta

4. Discuss All of these end in “phyta”
phyte, phyto or phyta refer to being ____________ like or being a ______________.

5. Euglenophyta the Euglenoids
plant-like photo- synthesis, but animal-like movement w/ flagellum
unicellular
autotroph and heterotroph
asexual reproduction
pellicle & red eye-spot
(eyespot)

6. Bacillarophyta Diatoms unicellular autotrophic – photosynthetic
chlorophyll & carotenoids
asexual or sexual reproduction
silica shells, diverse shapes
food storage as OIL not starch

7. Dinoflagellata Dinoflagellates have 2 (“di”) flagella unicellular
autotrophic – photosynthetic
chlorophyll & carotenoids

8. Dinoflagellata asexual reproduction [or weird fusion…]
thick cellulose plates
bioluminescence
can be harmful

9. Dinoflagellata
red tide

10. Discuss Which phylum of algae… have shells made of glass?
are responsible for the harmful red tides?
are both auto- and hetero- trophic?
Which type(s) of algae are phytoplankton, and what great benefit do phytoplankton serve?

11. Chlorophyta Green Algae – most diverse
unicellular, multicellular, or colonial
most in water but all need moist place to survive…

12. …a moist place like a SLOTH! [only 2 – 4 meters per minute ]
Chlorophyta
…a moist place like a SLOTH! [only 2 – 4 meters per minute ]

13. Chlorophyta
can have flagella
alternation of generations

14. Alternation of Generations
type of reproduction utilizing asexual & sexual means

15. Alternation of Generations
offspring generations alternate between being haploid [1n] in one generation to being diploid [2n] the next.

16. Alternation of Generations
Sporophyte [2n] produces spores [1n] through meiosis

17. Alternation of Generations
Spores [1n] produce gametophytes [1n] through mitosis

18. Alternation of Generations
Gametophyte [1n] produces gametes [1n] through mitosis

19. Alternation of Generations
Gametes [1n] fuse in fertilization to produce zygote [2n]

20. Alternation of Generations
Zygote [2n] grows to become embryo [2n]

21. Alternation of Generations
Embryo [2n] grows to become sporophyte [2n]…
etc.

22. Discuss – What You Need to Know About Alternation of Generations
type of reproduction utilizing _______________ & _______________ means
offspring generations alternate between being _______________ [1n] in one generation to being _______________ [2n] the next.
gametophytes [1n] make _______________ [1n] through mitosis
sporophytes [2n] make _______________ [1n] through meiosis

23. Other Phyla
Rhodophyta – sea weeds, red algae

24. Other Phyla Phaeophyta – brown algae, kelp most in salt water
have air bladders to keep them afloat

25. What is the most diverse group of plant-like protists?
Discuss
What is the most diverse group of plant-like protists?

26. Fungus-Like Protists Slime Molds, Water Molds, & Downy Mildews
unicellular to colonial
heterotrophic – saphrophytic
have cell walls
live in moist places
all have movement at some point in their life cycle to get to food

27. Fungus-Like Protists “mycota” / “mycete” – fungus or fungus-like
examples
myxomycota – plasmodial slime molds
form a plasmodium
no cell wall
no membranes

28. Fungus-Like Protists “mycota” / “mycete” – fungus or fungus-like
examples
myxomycota – plasmodial slime molds
form a plasmodium
many nuclei – cells merge together into a large mass
amoeboid movement
reproduce with spores

29. Fungus-Like Protists “mycota” / “mycete” – fungus or fungus-like
examples
acrasiomycota – cellular slime molds
come together to reproduce only when food is scarce – otherwise, independent
has cell membrane
haploid during entire life cycle

30. Fungus-Like Protists “mycota” / “mycete” – fungus or fungus-like
examples
oomycota – water molds & downy mildews
produce flagellated reproductive cells
very large and diverse group

31. Discuss What word refers to… the color red? the color green?
the color brown?
plant or plant-like?
fungus or fungus-like?

32. Homework complete the Euglena Reading & Coloring w/s
[and finish the webquest if you haven’t done so… it’s due tomorrow]