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LS FBTP Chapter 5

PLant Processes

TermDefinition
Stomata openings in leaf through which gases like CO2 and O2 pass
Guard Cells surround the stomata and control their opening and closing based on water level, light conditions, and glucose levels
Palisade upper layer of cells in a leaf, responsible for most of the photosynthesis in the leaf
Chloroplasts organelles in plant cells responsible for photosynthesis
Chlorophyll green pigment in plants and some protists and bacteria responsible for absorbing light energy
Photosynthesis the conversion of light energy into chemical energy (glucose) through the use of carbon dioxide and water
Light-dependent Reactions take place in the presence of light; primarily the splitting of water into hydrogen, which is saved by the plant cell, and oxygen, which is released as oxygen gas
Light-independent Reactions take place with or without light energy; carbon dioxide is converted into glucose with the help of enzymes and addition of hydrogen from light-dependent phase
Cellular Respiration series of chemical reactions that convert chemical energy (stored in glucose) into energy form useful to cells.
Internal Stimulus a factor from the inside which causes some change in the life processes of a creature
External Stimulus a factor from the outside which causes some change in the life processes of a creature
Tropism growth in response to a stimulus
Photo refers to light
Thigmo refers to touch
Baro refers to pressure
Gravi refers to gravity
Chemi refers to chemicals
Hormone a chemical released by a creature which controls a life process
Ethylene * ripens fruit * slows growth of terminal buds * controls dropping of leaves and fruit
Abscisic Acid * slows life processes of plant * prevents bud growth during winter months * closes stomata on hot summer days
Gibberellins * speed up life processes * promotes elongation of plant cells
Ctyokinins * promote cell division * promote lateral growth (new branches)
Auxin * causes cell elongation selectively (phototropism) * suppresses lateral growth (branches)
Photoperiodism a plant's response to the amount of daylight it receives
Long Day Plants produce blossoms when there is less than 12 hours of darkness (during the summer months) {Iris, cabbage, lettuce, carrots}
Short Day Plants produce blossoms when there is more than 12 hours of darkness (during spring or autumn months) {sunflowers, cucumbers, sweet potato, tulips}
Day Neutral Plants produce blossoms independent of how many hours of daylight they receive {dandelion, rhubarb, strawberry, kale}
Created by: MrGross