Seedless Plants Plant Evolution Plant Evolution Nonvascular Seedless
- Slides: 26
Seedless Plants
Plant Evolution
Plant Evolution Nonvascular Seedless plants – (Ordovician - 475 mya) l Vascular Seedless plants – (Devonian - 400 mya) l Vascular Seed plants – (Carboniferous - 360 mya) l Flowering plants – (Cretaceous - 130 mya) l
Plant Evolution (Common with Algae) Multicellular and Eukaryotic l Cell walls made of Cellulose l Chlorophyll a and b l Store excess sugar as starch l
Adaptations to Terrestrial Life Apical Meristems l Multicellular Dependent Embryos l Alternation of Generation l Walled Spores produced in Sporangia l Other Adaptations – Cuticle, stomata, Xylem & Phloem, secondary compounds l
Apical Meristems
Multicellular Dependent Embryos
Alternation of Generation
Walled Spores produced in Sporangia
Other Adaptations
Adaptations in Shallow Water Algae Subjected to occasional drying l Protection of gametes and embryos in gametangia l Sporopollenin l
Classification of Seedless Plants l Nonvascular Seedless plants – Bryophyta u Mosses – Hepatophyta u Liverworts – Anthocerophyta u Hornworts l Vascular Seedless plants – Lycophyta u Club mosses – Psilophyta u Whiskferns – Spenophyta u Horsetails – Pterophyta u Ferns
Nonvascular Seedless Plant is a thallus (no vascular tissue) – no true leaves, roots, stems l Embryophytes – gametangia u(antheridium and archegonium) – sporangium (produces spores) l
Hepatophyta l Liverworts – Two forms uleafy (80%) uthalloid (20%)
Hepatophyta l Liverworts – Reproduction uasexual (gemmae cups) usexual
Anthocerophyta l Hornworts – Similar to liverworts except for sporophytes – Most closely related to higher plants
Bryophyta Mosses
Bryophyta Mosses
Vascular Seedless Plants Formation of vascular tissue – Xylem (water) – Phloem (food) – True leaves, roots, and stems l Lignin l Sporophyte generation dominate l Sperm with flagella l
Lycophyta l Lycophytes – true leaves umicrophylls – true stems – true roots – sporophylls uleaves that produce spores
Psilophyta l Whisk Ferns – no true leaves – no true roots
Sphenophyta l Horsetails – true leaves umicrophylls – true stems usilica – true roots
Division: Pterophyta
Division: Pterophyta
Fern Life Cycle
- Why are nonvascular seedless plants only a few cells thick
- Multicellular dependent embryos
- Fern is vascular or nonvascular
- Vascular vs nonvascular plants
- Common characteristics of plantae
- Seed vs spore
- Hypnum sp nutritional habits
- Anthiridium
- Site:slidetodoc.com
- Is a fern sporophyte or gametophyte
- Seedless vascular plants
- Phyla of seedless vascular plants
- Which seedless plants have been used to treat bee stings
- Seed producing vascular plants
- Life cycle of seedless plants
- Plants are multicellular eukaryotes
- Chapter 29 plant diversity
- Heterosporous vs homosporous
- Unit 2 lesson 12 flowering plants
- How does a plant reproduce
- Phylum and species
- Seedless vascular plants phylum
- The are seedless vascular plants with hollow jointed stems.
- Wheat
- Which seedless plants have been used to treat bee stings
- Biomass advantages
- Heterosporous