bio exam notes

bio exam notes - Plant Organs Leaves Stems Roots Flowers...

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Plant Organs Leaves Stems Roots Flowers Fruits Tissue system runs through and connects all plant organs Plant Roots Adventitious – develop from part of plant other than root Tap Root – system of one main root that formed from the seedlings enlraged radical (embryonic root) in eudictos and gymnosperms Fibrous Root – form when embryonic root is short-lived; has several to many roots of similar size developing from end of stem Ground Tissue System Most of the plant, in between the dermal and vascular tissue; Functions: Photosynthesis, Storage, Support Fruits Simple Fruits – develop from 1 ovary Aggregate Fruits – develops from 1 flower, but many pistils Multiple Fruits – formed from ovaries of many flowers that grow in close proximity on common stalk Accessory Fruit – both plant tissue and ovary make up fruit Tissue Systems Dermal Tissue System Forms the outer covering of the plant; Functions: covering/protection Vascular Tissue System System that extends throughout the body that is responsible for conduction of various substances; Functions: conducting support Epidermal (Complex) Single layer cells (seen in herbaceous plants); composed of relatively unspecialized cells Parenchymal Tissue (simple) Contains parenchymal cells (most common type of cell) Primary wall is thin an contains predominantly cellulose (also contains hemicelluloses and pectin) Functions: Photosynthesis, Storage, Secretion Can differentiate if plant is injured Xylem (Complex) Conducts water and dissolved minerals from the roots to stems and leaves; provides structural support Phloem (Complex) Conducts organic matter, food material throughout the plant and provide structural support Sclerenchymal Tissue (simple) Contains sclerenchymal cells Extremely thick primary and secondary cell walls that are rich in lignin (unable to strength or elongate) Dead at functional maturity Function: protection, support Peridermal (Complex) Tissue that is several layers thick that forms under epidermis to provide after epidermis dies
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bio exam notes - Plant Organs Leaves Stems Roots Flowers...

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