BIOL 1114: Exam #2
17 Cards in this Set
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Adaptive Radiation
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The divergence of many new species from an ancestral species, usually a rapid process, often tied to the colonization of new environments.
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Photosynthesis
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Light dependent reaction: photosynthetic pathways that use absorbed light energy to make ATP (photo phosphorylation) and NADPH.
Light independent reaction: Chemical reactions of photosynthesis that do not require DIRECT light energy directly to transform (or fix) carbon dioxide into orga…
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Photosystem I & II
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Two clusters of pigment molecules that concentrate light energy at the chlorophyll a reaction center, eject and transfer an energized electron to an electron transport chain, which drives the formation of ATP
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Reflectance
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Scatter and reflection of electromagnetic radiation; wavelengths that are not absorbed are reflected.
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Absorbance
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The ability to take up electromagnetic radiation by objects; different wavelengths of the visible light spectrum have different absorbances and appear as different colors.
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Wavelength
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the distance moved by a photon (basic smallest unit of light) during a complete vibration; dependent on the energy of a photon; higher energy photons have shorter wavelength
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White light
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Absorbs nothing
Reflects everything
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Black Light
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Reflects nothing
Absorbs everything
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Evolution
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the process by which the genetic composition of populations change over time.
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Speciation
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forming a new species over time
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Divergence
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1 species over speciation will give rise to a new species
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Species
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all member of a type of organism that can interbreed with one another and are reproductively isolated with members of other species
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Paralysis
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complete loss of muscle function for one or more muscles.
not enough stimuli
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Convolution
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Too many stimuli reach the muscle
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Curare & Atropine
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blocks receptor for neurotransmitter (paralysis)
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Physostigmine
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blocks break down of neurotransmitter (convolution)
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Frog Toxin & Pufferfish Toxin
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stop the action potential completely (paralysis)
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BIOL 1114: Exam #2