BIOL10005 Lecture Notes - Lecture 20: Vascular Cambium, Spindle Apparatus, Vascular Tissue

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Key adaptations required for plants to live on land. Features that make ferns more adapted to land than moss. Animals developed their body plan prior to colonization of land. Believe to be the closest relatives of land plants. Similar features of mitotic spindle (more related to land plants than mosses: land plants adaptations. Cuticle, stomata, xylem, lignin, differentiation of plant body: stems, roots, leaves, secondary growth, egg protection, egg dispersal, embryo in seed, sporophyte dominance in life cycle, pollination. Cuticle: covers the upper surface of the plant (secreted by the cells on the epidermis) Impervious to uv radiation and water; has a hydrophobic coating. Differentiation of plant body: stem, roots, leaves. Secondary growth: for plants to grow large stronger vascular connection. Can grow in arid areas (but usually live close to water) Egg cell is not motile; stays on the female. After fusion, the zygote immediately undergoes meiosis to form 4 haploid cells.

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