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Auxin
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Plant hormone that causes plant leaves and stems to exhibit positive phototropisms (p.340)
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Chlorophyll
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Green, light trapping pigment in plant chloroplasts that is important in photosynthesis (p.330)
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Day-neutral Plant
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Plant that doesn't require a specific photoperiod and can begin the flowering process over a range of night lengths (p.342)
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Long-day Plant
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Plant that generally requires short nights - less than ten to 12 hours of darkness - to begin the flowering process (p.342)
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Photoperiodism
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A plant's response to lengths of daylight and darkness each day (p.342)
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Photosynthesis
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Food-making process that takes place in the chloroplasts of plant cells (p331).
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Respiration
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Series of chemical reactions used to release energy stored in food molecules (p.333)
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Short-day Plant
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Plant that generally requires long nights - 12 or more hours of darkness - to begin the flowering process (p.342)
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Stomata
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Tiny openings in a plant's epidermis through which carbon dioxide and water vapor gases enter and leave a leaf (p.305 & 329)
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Tropism
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Positive or negative plant response to an external stimulus such as touch, light, or gravity (p.338)
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Photosynthesis
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Where light energy is used to produce glucose and oxygen from carbon dioxide and water (p.331).
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Stimulus
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Anything in an environment affecting the behavior of an organism (p.337).
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Homeostasis
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Regulation of an organism's internal, life-maintaining conditions despite changes in its environment (p.527)
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Glucose
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Synthesize carbohydrates; sugars
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Glycolysis
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The enzymatic breakdown of a carbohydrate (as glucose; breakdown of sugar.
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