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What is the name of the group we are studying today and tomorrow? A) flowering plants B) fungi C) bacteria D) mosses E) don’t care, where are the snacks?. Bryophytes- Chapter 16. True or false . Bryophytes are plants. Bryophytes grow only in the water, but not on land.

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slide1
What is the name of the group we are studying today and tomorrow?
    • A) flowering plants
    • B) fungi
    • C) bacteria
    • D) mosses
    • E) don’t care, where are the snacks?
bryophytes chapter 16
Bryophytes- Chapter 16
  • True or false.
    • Bryophytes are plants.
    • Bryophytes grow only in the water, but not on land.
slide3
Which of the following is not true of plants?
    • A) they are mostly autotrophic
    • B) they are primarily terrestrial
    • C) they have the same photosynthetic pigments

as brown and red algae

    • D) they are multicellular
    • E) still don’t care, where is the popcorn?
kingdom plantae embryophytes
Kingdom Plantae- embryophytes
  • Autotrophic (mostly).
  • Multicellular with advanced tissue differentiation.
  • Heteromorphic alternation of generations, where the
    • Diploid phase (sporophyte) includes an embryo.
    • Haploid phase (gametophyte) produces gametes by mitosis.
  • Chlorophylls A & B, carotenoids.
  • Starch stored inside chloroplasts.
  • Habitat- primarily terrestrial.
  • Sporopollenin present.
  • Male and female gametangia present.
  • Photosynthetic tissues produced by an apical meristem.
  • Sporangia with a sterile jacket.
  • Plasmodesmata present.
  • ~330,000 species.
slide6
True or false.
    • ‘Bryo’ is greek for moss.
    • Liverworts and hornworts are bryophytes.
    • The moss sporophyte is nutrionally dependent on the female gametophyte.
    • Water is not required for fertilization in mosses.
bryophytes
Bryophytes
  • Bryo- gr. moss.
  • Liverworts, hornworts, and mosses.
  • Gametophyte dominant.
  • Sporophyte matrotrophic and short lived (6-16 weeks).
  • Water required for fertilization.
  • Sexual reproduction involves antheridia and archegonia.
  • Biflagellated sperm.
  • Asexual reproduction by fragmentation and gemmae.
  • Plasmodesmata present.
  • Rhizoids in most.
  • Protonemata in most (not the hornworts).
  • Stomata or stomata-like structures present.
  • ~16,000 species.
slide9
True or false.
    • Liverworts because they are shaped like a liver and look glandular were used to treat liver disease in earlier times.
    • The specimen marked ‘A’ is a leafy liverwort and the one marked ‘B’ a thalloid liverwort.

A

B

marchantiophyta liverworts
Marchantiophyta- liverworts
  • Hepato- gr. liver.
  • Sporophytes without stomata, but have pores.
  • Specialized conducting tissue absent.
  • Gametophytes thalloid or leafy.
  • Rhizoids single celled.
  • Simplest of all living plants.
  • Sporangium with dehiscent capsule, elaters present in some to disperse spores.
  • Most cells contain numerous chloroplasts.
  • Habitat- moist, some aquatic, temperate and tropical.
  • 6,000 species.
  • Examples- Marchantia and Riccia.
slide13
True or false.
    • Shown below are male gametophytes.
anthocerotophyta hornworts
Anthocerotophyta- hornworts
  • Antho- gr. flower, keras- gr. horn.
  • Sporophytes with stomata.
  • Specialized conducting tissue absent.
  • Gametophytes thalloid.
  • Rhizoids single celled.
  • Sporangia dehisce to disperse spores, elater-like structures present.
  • Most cells contain a single chloroplast.
  • Sporophyte with basal intercalary meristem.
  • Habitat- moist temperate and tropical.
  • 100 species.
  • Example- Anthoceros
slide17
Hornwort sporophytes ___________________.
    • A) are nutrionally dependent on the female gametophyte
    • B) are primarily terrestrial
    • C) lack stomata
    • D) contain a sporangium
    • E) all of the above
  • True or false.
    • Anthoceros is an example of a true moss (Phylum Bryophyta).
    • Hornwort gametophytes are thalloid.
bryophyta mosses
Bryophyta- mosses
  • Sporophytes with stomata.
  • Specialized conducting tissue- leptoids and nonlignified hydroids.
  • Gametophytes leafy.
  • Rhizoids multicellular.
  • Sporangia with dehiscent capsules.
  • Most cells with numerous chloroplasts.
  • Habitat- moist and dry, temperate and tropical, some aquatic.
  • 9,500 species.
  • Example- Polytrichum, Sphagnum, Mnium.
slide19
“Cushiony”

“Feathery”

three moss classes
Three Moss Classes
  • Bryidae- true mosses, Polytrichum.
    • Protonema with a single row of cells with slanted cross walls.
    • Leafy gametophytes develop from minute budlike structures.
  • Sphagnidae- peat mosses, Sphagnum.
    • Protonema with plate of cells that is one layer thick.
    • Gametophytes with clusters of branches, 5 per node.
    • Explosive capsular operculum.
  • Adreaeidae- granite mosses, Andreaea.
    • Protonema with 2 or more rows of cells.
    • Capsule dehisces by splitting in four.
    • Rhizoids occur in 2 rows.
    • Mountainous or arctic regions on rocks.
slide22
Moss sporophytes ____________________.
    • A) are nutrionally dependent on the female gametophyte
    • B) are aquatic and terrestrial
    • C) have multicellular rhizoids
    • D) include Polytrichum, Sphagnum, and Mnium
    • E) all of the above
  • True or false.
    • Moss sporophytes contain stomata.
    • Moss gametophytes are thalloid and leafy.
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