Bio 106 Exam 2

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Anonymous
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204542
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Bio 106 Exam 2
Updated:
2013-03-03 00:55:00
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Plant Biology
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Biology 106 Plant Bio Exam 2
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  1. What are Charophyceans?
    • Green Algea
    • Closest relatives of land plants
  2. What are the 5 Key traits Charophyceans share with Land Plants?
    • 1. Similarities in Cell Wall Synthesis
    • 2. Peroxisome Enzymes - Minimize loss of organic products
    • 3. Structure of Sperm
    • 4. Similarities During Cell Division
    • 5.Homologous Chloroplast
  3. What is Sporopollenin?
    Sporopollenin is a layer of durable polymer in Charophyceans that prevents exposed zygotes from drying out
  4. 5 Key Traits in Nearly All Land Plants
    • 1. Apical Meristems - Regions of cell division at tips of roots and shoots that let plant extend to get water and nutrients.
    • 2. Alternation of Generations - (gametophytes and Sporophytes)
    • 3. Walled Spores Produced in Sporangia
    • 4. Multicellular gametangia
    • 5. Multicellular dependent dependent embryos
  5. Sporophyte
    Diploid Generation
  6. Gametophyte
    Haploid Generation
  7. Vascular Tissue
    Cells joined in tubes to transport water and nutrients
  8. Byrophytes and examples
    • Non-vascular Plants
    • - Liverworts phylum Hepatophyta
    • - Hornworts phylum Anthocerophyta
    • - Mosses phylum Byrophyta
  9. Ecological and Economic Importance of Mosses
    • Example:
    • "Peat Moss"
    • Forms ectensive deposits known as Peat
    • Earth's carbon Cycle
  10. What plants formed the First Forests?
    • Ferns and other seedless vascular plants
    • Sporophyte Dominant
  11. Two Types of Vascular Tissue
    Xylem - Conducts mostly water and minerals consists of dead cells

    Phloem - Distributes sugars, amino acids, and other organic products consists of living cells
  12. Roots
    Organs that anchor vascular plants and absorbs water and nutrients from the soil
  13. Leaves ans the two types
    • Increase the surface area to capture solar energy
    • 1. Microphylls - Leaves with single vein
    • 2. Megaphylls - leaves with a highly branched vascular system
  14. Sporophylls and spore variations
    • Modified leaves with sporangia
    •    * Sporangia produces spores
    • Variations: 
    • Homosporous - one type of sporangium that produces one type of spore.
    • Heterosporous - 2 sporangia and produces 2 kinds of spores.

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