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PLANTS
PLANTS
75
Biology
11th Grade
01/25/2009

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Term
ROOTS
Definition
underground (usually), anchor the plant in the soil, absorb water and nutrients, food storage
Term
SHOOTS
Definition
above ground, elevates the plant above the soil, photosynthesis reproduction
Term
MONOCOTS
Definition
1 cotyledon (seed leaf), parallel-veined leaves, primary vascular bundles scattered, pollen monosulcate, root system adventitious, floral parts in 3's
Term
DICOTS
Definition
2 cotyledon, net-veined leaves, primary vascular bundles in rings, pollen mostly tricolpate, root system primary and adventitious
Term
PARENCHYMA CELLS
Definition
thin and flexible cell wall, carry on most of the plant's metabolic functions, have a large central vacuole
Term
COLLENCHYMA CELLS
Definition
thicker primary cell wall, support of herbaceous plants
Term
SCHLERENCHYMA CELLS
Definition
thick secondary cell wall, cannot increase in length, two types: fibers-long and schlerids-short
Term
XYLEM
Definition
conducts most of the water and minerals
Term
PHLOEM
Definition
livin sugar-conducting cells arranged into tubes that ditribute sugars
Term
DERMAL
Definition
outive protecting covering
Term
VASCULAR
Definition
carries out long-distance transport of materials between roots and shoots
Term
PRIMARY GROWTH
Definition
plants growth in length
Term
SECONDARY GROWTH
Definition
plants growth in thickness
Term
ZONE OF CELL DIVISON
Definition
includes the root apical meristem and its derivatives
Term
ZONE OF ELONGATION
Definition
root cells elongate
Term
ZONE OF MATURATION
Definition
cells complete their differentiation and become functionally mature
Term
EPIDEMIS
Definition
a single layer of tightly packed cells
Term
STOMATA
Definition
allows CO2 exchange between the surrounding air and the photosynthetic cells inside the leaf
Term
GUARD CELLS
Definition
regulate the opening and closing of the pore
Term
PISTIL
Definition
a group of fused carpels
Term
STIGMA
Definition
a landing platform for pollen
Term
STYLE
Definition
stalk of a flower's carpel, with the ovary at the base and the stigma at the top
Term
OVARY
Definition
portion of a carpel in which the egg-containing ovules develop
Term
STAMEN
Definition
pollen-producing reproductive organ of a flower, consisting of a anther and filament
Term
ANTHER
Definition
the terminal pollen sac of a stamen, where pollen grains with male gametes form
Term
FILAMENT
Definition
the stalk of the stamen
Term
DOUBLE FERTILIZATION
Definition
2 sperms cells unite with 2 cells in the embryo sac to form the zygote and endosperm
Term
AUXINS
Definition
Hormones that affect the growth of plant tissue
Term
ABSCISSION
Definition
things falling off a tree
Term
INDOLEACTETIC ACID (IAA)
Definition
Affects the root and shoot tips of the plant
Term
GIBBERELLINS
Definition
Promote cell divison and elongation
Term
CYTOKININS
Definition
Promote cell divison; found in almost all higher plants
Term
TROPISM
Definition
The growth of a plant in a specific direction in response to a stimulus
Term
Photosynthesis
Definition
the process by which light energy is converted into the stored chemical energy of organic molecules
Term
Autotrophs
Definition
sustain themselves without eating anyhting devrived from other organisms
Term
Heterotrophs
Definition
obtain their organic material from other organisms
Term
Chloroplast
Definition
are structurally similar to and likely evolved from photosynthetic bacteria
Term
Chlorophyll
Definition
the green pigment within chloroplast, absorbs light primarily in the blue and red regions of the visible spectrum
Term
Chlorophyll a
Definition
initiates light-dependent reactions of photosynthesis; relects bright green
Term
Chlorophyll b
Definition
accesory pigment that also participates in photosynthesis; reflects yellow-green
Term
Carotenoids
Definition
accesory pigment; reflects yellow/orange
Term
NADP+
Definition
carrys hydrogen
Term
Antenna Complexes
Definition
arranged throughout the thylakoid to absorb and transfer light energy to the reaction center
Term
Reaction Center
Definition
converts light energy to chemical energy through a series of electron transfer reactions
Term
photorespiration
Definition
rubisco adds O2 instead of CO2 in the Calvin Cycle
Term
C4 plants
Definition
minimize the cost of photoresoiration by incorporating CO2 into four-carbon compounds in mesophyll cells
Term
CAM plants
Definition
use crassulacean acid metabolism to fix carbon, open their stomata at night incorporating CO2 into organic acids
Term
Porphyrin Ring
Definition
made up of smaller rings composed of carbon and nitrogen atoms; absorbs light energy
Term
Hydrocarbon side chain
Definition
makes the molecule extremely non-polar
Term
Pigments
Definition
substances that absorb visible light
Term
Linear electron flow
Definition
the primary pathway, involves both photsystems and produces ATP and NADPH using light energy
Term
Photon
Definition
hits a pigment and its energy is passed among pigment molecules until it excites P680
Term
excited electron
Definition
P680 is transferred to the primary electron acceptor
Term
Cyclic electron flow
Definition
uses only photosystem 1 and produces ATP, but NOT NADPH
Term
Photosynthesis
Definition
the process by which light energy is converted into the stored chemical energy of organic molecules
Term
Autotrophs
Definition
sustain themselves without eating anyhting devrived from other organisms
Term
Heterotrophs
Definition
obtain their organic material from other organisms
Term
Chloroplast
Definition
are structurally similar to and likely evolved from photosynthetic bacteria
Term
Chlorophyll
Definition
the green pigment within chloroplast, absorbs light primarily in the blue and red regions of the visible spectrum
Term
Chlorophyll a
Definition
initiates light-dependent reactions of photosynthesis; relects bright green
Term
Chlorophyll b
Definition
accesory pigment that also participates in photosynthesis; reflects yellow-green
Term
Carotenoids
Definition
accesory pigment; reflects yellow/orange
Term
NADP+
Definition
carrys hydrogen
Term
Antenna Complexes
Definition
arranged throughout the thylakoid to absorb and transfer light energy to the reaction center
Term
Reaction Center
Definition
converts light energy to chemical energy through a series of electron transfer reactions
Term
photorespiration
Definition
rubisco adds O2 instead of CO2 in the Calvin Cycle
Term
C4 plants
Definition
minimize the cost of photoresoiration by incorporating CO2 into four-carbon compounds in mesophyll cells
Term
CAM plants
Definition
use crassulacean acid metabolism to fix carbon, open their stomata at night incorporating CO2 into organic acids
Term
Porphyrin Ring
Definition
made up of smaller rings composed of carbon and nitrogen atoms; absorbs light energy
Term
Hydrocarbon side chain
Definition
makes the molecule extremely non-polar
Term
Pigments
Definition
substances that absorb visible light
Term
Linear electron flow
Definition
the primary pathway, involves both photsystems and produces ATP and NADPH using light energy
Term
Photon
Definition
hits a pigment and its energy is passed among pigment molecules until it excites P680
Term
excited electron
Definition
P680 is transferred to the primary electron acceptor
Term
Cyclic electron flow
Definition
uses only photosystem 1 and produces ATP, but NOT NADPH
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