Xerophytic Plant Leaf Adaptations Xerophytes (from the Greek xero for ‘dry’) are plants that are adapted to dry and arid conditions Xerophytes have physiological and structural (xeromorphic) adapta...
Water & the Transpiration Pull The movement of water Water has unique properties it is polar hydrogen bonds form between the water molecules Water moves from the roots to the leaves because of ...
Transpiration Explained The movement of water through a plants xylem is largely due to the evaporation of water vapour from the leaves and the cohesive and adhesive properties exhibited by water mo...
Water & Mineral Ion Transport: Pathways & Mechanisms Within a plant mineral ions and organic compounds (eg. sucrose) are transported by being dissolved in water. The dissolved mineral ions ...
Phloem Sieve Tube Elements & Companion Cells: Structure & Function The function of phloem tissue in a plant is to: Transport organic compounds (assimilates), particularly sucrose, from the ...
Xylem Vessel Elements: Structure & Function The functions of xylem tissue in a plant are: Vascular tissue that transports dissolved minerals and water around the plant Structural support Food s...
Xylem & Phloem Distribution Xylem The functions of xylem tissue in a plant are: Vascular tissue that carries dissolved minerals and water up the plant Structural support Food storage Xylem tiss...
Transverse Sections: Stems, Roots & Leaves Dicotyledonous (dicots) plants Dicotyledonous (dicots) plants have: Seeds that contain two cotyledons (seed leaves) Network of veins Leaves that typic...
Gene Mutations & Their Effect on Polypeptides A gene mutation is a change in the sequence of base pairs in a DNA molecule that may result in an altered polypeptide Mutations occur continuously ...
