Chapter 4 - Photosynthesis

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10 Terms

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Photosynthesis
the process by which plants convert carbon dioxide and water into sugars using sunlight as energy in the presence of chlorophyll.
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Light intensity
The limiting factor on the rate of photosynthesis besides, carbon dioxide concentration and temperature
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cuticle
protects the epidermis and prevents excessive water loss through evaporation.
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Guard Cells
Bean-shaped, chloroplast-containing cells located in the lower epidermis.
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Upper epidermis
single layer of irregular, closely packed cells covered by a layer of waxy cuticle.
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Palisade mesophyll
cells that are columnar in shape and closely packed
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Spongy mesophyll
cells that are irregular in shape with numerous intercellular air spaces around them to allow for fast diffusion of carbon dioxide
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Vascular Bundles
The name given to xylem and phloem tissues collectively
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Stomata
Structures in plants, opened during the day for carbon dioxide intake and closed during the night to minimise water loss through transpiration.
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Flaccid
The appearance of guard cells when there is excessive water loss, even during the day, and they lose turgor