Environmental Biology Exam 3.1
Absorption Spectrum
Wavelengths of light absorbed.
Acclimation
Short term adjustment to tolerate stress.
Action Spectrum
Wavelengths of light at which processes occur.
Adaptation
Permanent genetic change that allows organism to tolerate stress.
Allelopathic Compounds
Biochemicals that affect the growth of nearby organisms.
Antagonistic Resources
When two resources that have toxic interactions are consumed, more of each resource must be consumed.
Autecology
Study of the environmental factors that influence individuals.
Anthracite
Highest quality coal.
Bundle-sheath Cells
Where Calvin Cycle occurs in C4 plants.
Carboxylase
Adds carbon from CO2 to an organic molecule.
Cuticle
Waxy layer on epidermis of leaf.
Drag
Force resulting from the viscous properties of the medium an organism is moving through.
Ectotherms
Internal temperature varies with external temperature.
Endotherms
Internal temperature remains constant.
Epidermis
Outer layer of leaf.
Euryhaline
Can tolerate wide range of salinity.
Eurythermal
Can tolerate wide range of temperatures.
Gelbstoff
Dissolved organic and humic materials from terrestrial runoff.
Genet
Product of the zygote, made up of repeated genetically identically units.
Holdridge’s Life Zone Classification
Habitats based on temperature, rainfall, and relative humidity.
Homeotherm
Relatively constant internal temperature.
Inertia
Resist to change in motion.
Liebig’s Law of the Minimum
Total yield of organism determined by nutrient in lowest supply.
Bituminous
Lower quality than anthracite.
Lignite
Lower quality than bituminous.
Metabolic Rate
Measure of the amount of energy used per unit of time.
Modular Organisms
Colony/clonal organisms, difficult to define individual.
Nastic Movement
Plant growth in relation to stress.
Orogeny
Uplift/mountain building.
Oxygenase
Adds oxygen to organic molecule instead of carbon.
Palisade Parenchyma
Long, rectangular mesophyll cells.
Pangaea
Supercontinent.
PAR Spectrum
Photosynthetically Active Radiation.
Peat
Accumulation of partially decayed organic matter.
PEPck
Resides in outermost photosynthetic cells, grabs CO2 into a C4 compound.
Photorespiration
Net loss of fixed carbon.
Poikilotherm
Varying internal temperatures.
Ramet
Asexually produced individuals from genet.
Reynold’s Number
Dimensionless number expressing the ratio of inertial to viscous forces.
RuBisCO
Fixes carbon from CO2, or oxygen to organic molecule. Most abundant protein on earth.
Spongy Parenchyma
Round mesophyll cells that create spaces within leaf.
Stenohaline
Tolerates narrow range of salinity.
Stenothermal
Tolerates narrow range of temperatures.
Stomata
Opening in leaf that allows gas exchange.
Succulence
Stores water.
Synergistic/Complementary Resources
When two resources that interact beneficially are consumed, less of each must be consumed.
Terminal Moraine
Maximum advance of glacier.
Unitary
Individual of a species easy to identify.
Wisconsonian
Glacial deposit in Poconos.
Xerophyte
Grow in dry regions.
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