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ch 28 (Plant growth (Secondary Growth (occurs at lateral meristems…
ch 28
Plant growth
meristem: plant tissue that remains embryonic as long as the plant lives, allowing for indeterminate growth
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determinate growth: a type of growth characteristic of most animals and some plant organs in which growth stops after a certain size is reached
occurs in thorns, leaves and flowers
Indeterminate growth: a type of growth characteristics of plants in which the organism continues to grow as long as it lives
occurs when plants have undifferentiated tissues called meristems that divide leading to a new cell that can elongate
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Primary Growth: occurs at apical meristem in roots and shoots and enables growth in length (for all plants)
Basic Plant Organs
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Roots (Root system): organ that anchors a vascular plant in the soil, absorbs minerals and water and stores carbohydrates
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Taproots: one verticle root that is deep in the soil to prevent plants from falling over: allows plants to grow tall
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root hairs: thin finger-like extension of root epidermal cells; root hairs increase surface are for absorption
Parts of a leaf
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Stomata: allows gas exchange between environmental air and photosynthetic in leaf - located in epidermis
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Major Plant Tissues
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Dermal Tissue: outer protective covering of a plant that defends the plant against pathogens and physical damage
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