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8.15 Mrs Jensen
Plant Processes
10
Science
8th Grade
11/11/2011

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Term
stomata
Definition
openings on leaf surfaces or leaf-like structures through which gases like carbon dioxide and water vapor may enter and leave the plant
Term
transpiration
Definition
loss of water vapor through the stomata of a leaf
Term
photosynthesis
Definition
food-making process that takes place in the chloroplasts of plant cells and creates glucose and oxygen
Term
respiration
Definition
series of chemical reactions by which all living cells break down food to release energy
Term
tropism
Definition
response of a plant to an outside stimulus such as gravity or light
Term
auxin
Definition
type of plant hormone that can cause plants to show positive phototropism
Term
photoperiodism
Definition
response of a plant to the number of hours of daylight and darkness it receives each day
Term
long-day plant
Definition
plant that needs less than ten to twelve hours of darkness to begin the flowering process
Term
short-day plant
Definition
plant that needs twelve or more hours of darkness to begin the flowering process
Term
day-neutral plant
Definition
plant that does not have a specific photoperiod and whose flowering process can begin over a wide range of hours or darkness
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