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II. Fern Moss covered forest in New Zealand Wow check this out! http://video.google. com/videoplay?doc id=8558307171261 435083 http://video.google. com/videoplay?doc id=8558307171261 435083
Monophyletic Multicellular eukaryotic Photosynthetic autotrophs Cell walls=cellulose Gametangium = embryophyte Starch storage All have chlorophyll a all have Chlorophyll b as an accessory pigment Nearly all are terrestrial What are “plants”?
Algae v Plants ? Retention of the zygote (gametangium: antheridium, archegonium) Also, most plants are terrestrial.
Gametophyte (n) is retained within the sporophyte (2n) Seed replaces the spore A seed is an embryo packed along with food in a protective coat. All are heterosporous: (microspores= pollen M. ; megaspores= ovule F. ) What is different between pollen and sperm? Seed Plants Ch 30
Moss, ferns, conifers and angiosperms Ch 29-30 PRACTICE QUIZ
I. Moss 1. This picture shows the moss gametophyte or sporophyte ? 2. The chromosome # is: n or 2n?
I. Moss 3. Why are moss usually very short? 4. Why are their reproductive methods considered less adapted to land than the cone-bearing group’s? 5. A. The (sporophyte or gametophyte) generation is the most dominant phase of the moss life cycle. B. Which phase (sporophyte or gametophyte) contains the archegonia and antheridia?
II. Fern 11. These structures are called: _____ 12. They are part of the ( sporophyte or gametophyte? ). 13. The dominant stage in the fern life cycle is the ( sporophyte or gametophyte? ).
II. Fern 14. a. When the spores germinate for both the moss and the ferns, a _____ grows. b. Is a fern’s spore a homospore or a heterospore? How can you tell? 15. Both moss and fern have coating of ________ on their spores. This same coating is on conifer and angiosperm pollen. What is its function? 16. What are the root-like structures called on the moss? Why aren’t they real roots?
17. Where does meiosis occur in a fern? 18. What is special about the fern gametophyte? http://video.google.com/videoplay?docid=- 6688095687710215331&q=fractal+fern&tot al=7&start=0&num=10&so=0&type=search &plindex=2http://video.google.com/videoplay?docid=- 6688095687710215331&q=fractal+fern&tot al=7&start=0&num=10&so=0&type=search &plindex=2 fern fractal!! New Zealand fern
BONUS: What are some problems with life on land? (think of the difficulties that algae might have have on land) 1. Desiccation (drying out) 2. Gas exchange 3. Temperature regulation 4. Support 5. Dispersal 6. Reproduction
Flowers & Fruits of Angiosperms flower anatomy review Fruit = ovary, ovules = seeds Endosperm nutrients (3n) Angiosperms and animals have shaped one another’s evolution (coevolution) Humans too! (agriculture)
Gymnosperms (“naked seeds”) (conifers, cycads, ginkgo, gnetophytes) More suited for dry climates Angiosperms (“container seed”) Flowering Plants Most diverse and widespread of all plants Xylem specialized (tracheids, vessel elements) fiber