Ms. Frost  A world of biology.....
  • Welcome
    • About me
    • IB Calendar
  • IB: Introduction to cells
    • Origin of Cells
    • Membrane Structure and transport
    • Cell division
    • Structure of DNA and RNA
    • DNA Replication
    • Transcription and gene expression
    • Translation
  • Molecules to Metabolism
    • Molecular diagrams
    • Water
    • Carbohydrates and Lipids
    • Proteins and Enzymes
    • Lactase / Enzyme Inhibition
    • Cellular Respiration
    • Phases of Cellular Respiration
    • Earth atmosphere / Color
    • Photosynthesis
  • Digestion and absorption
    • The kidney and osmoregulation
    • Neurons and synapses
    • Muscle and Movement
    • The blood system
    • Gas exchange
    • Defense against infectious disease
    • Antibody production and vaccination
    • Hormones, Homeostasis
    • Sexual reproduction
  • Genetic modification and biotechnology
  • Genetics and Genes
    • Chromosomes
    • Meoisis
    • Inheritance
    • MORE Inheritance
  • Evidence of evolution
    • Natural selection
    • Gene pools and speciation
    • Classification of biodiversity
    • Cladisitics
  • Ecology Species, communities and ecosystems
    • Energy Flow
    • Carbon Cycling
    • Climate change
  • Option C: Species and communities
    • Option C: Communities and ecosystems
    • Option C: Impacts of human on ecosystems
    • Option C: Conservation of biodiversity
  • Plants: Transport in the xylem of plants
    • Transport in the phloem of plants
    • Growth in plants
    • Reproduction in plants
  • Anatomy Language
    • Epithelial/Connective/Skeletal
    • Muscular / Nervous Tussue
    • Heart
  • Western Hills Website
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  • World Population Clock
  • Pre AP Biology
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Transport in the xylem of plants

Hidden rainforests
​Understandings:
• Transpiration is the inevitable consequence of gas exchange in the leaf.
• Plants transport water from the roots to the leaves to replace losses from transpiration.
• The cohesive property of water and the structure of the xylem vessels allow transport under tension.
• The adhesive property of water and evaporation generate tension forces in leaf cell walls.
• Active uptake of mineral ions in the roots causes absorption of water by osmosis
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Application: Adaptations of plants in deserts and in saline soils for water conservation.

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Skill: Drawing the structure of primary xylem vessels in sections of stems based on microscope images


Application: Models of water transport in xylem using simple apparatus including blotting or filter paper, porous pots and capillary tubing


Transpiration

Transpiration animation
Transpiration inquiry

Skill: Measurement of transpiration rates using potometers. (Practical 7)
Skill: Design of an experiment to test hypotheses about the effect of temperature or humidity on transpiration rates.
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Jungle - How nature works

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