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15 Cards in this Set
- Front
- Back
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Fundamental Properties of Life
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Celluar Oraganization
Sensitivity growth development reproduction regulation homeostusis heredity |
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origin of life hypothesis
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SPECIA CREATION
supernatural or divine origin EXRATERRESTIAL ORIGIN panpermia SPANTANEOUS ORIGIN life origin ated from inanimate materials |
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disproving spontoneous experiments
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DFRONCESCO REDI (1627-1691)
fresh meat in a jar w/no cover =maggots fresh meat in a jar cover = no maggots conclasion: decaying meat i sa nesting ground for maggots |
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disproving spontaneaus
generaton:experiments |
boied decayiing matter & seadit=no microoganisms
hwy boil? kill any microoganisms present led to the use of heat sterilization for food presevation conclusion! life dose not spontaneouse from decuying matter |
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dispraving spontaneous generatio experiments
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3) louis pustar (1822-1895)
boied meat with broyh in a flack allowedair in,but nomicoorganism=no life allowedair & micoganisms in =life conduson:life mustbe present for new life tp from |
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new theory of life: biogenesis
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BIOGENESIS= PRINCIPLE THAT A LIVING ORGONISN CANARISE ONLY FROM OTHER LIVING THINGS
primordial soup=chemical mix reprenting the condition of early earth h2o h2 co2 co n2 h4 nh3 no free o2 or o3 |
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from prokoryotes to eukaryotes
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early prokaryortes were heterotron and anaerobic getting energy through fermetation
matatio for the first aoutorophs getting energy from protoyntesis matation fromed aerbic prokaryotes production of o2 killed many of the anaerobic prokarytes |
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edosymbiont hyponthesis cont.
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[endo=within]
[endocytosis=(ctyto=cell) a prosess of cell eating [endosymiosis=cells are engulfed,but not insted cell live together is a metuslly |
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early earth
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many
elements present, they just meeded to be combined:original condition could not support life as we no it today |
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origin of life-location ideas
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OCEANS EDGE
bubble hypothesis UNDER FROZEN SEAS probiematric due to necessary conditions DEEP IN EARTHS CRUST byproduct of volcanic activity WITHIN CLAY positively-charged clay DEEP SEA VENTS conditions suitable for achaea |
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early earth conditions
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intense uv radationdueto luck of o3= no ozone layer
violent thunder storms frequent volcanic erution sounds nice right |
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early life
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scientists believe life on earth is a producyion of itself
elements combined to form many molecues including complex ones |
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early life cont'd
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around 2 bya slightly more complex organisms evolved
organisms moved from water about 450 mya |
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oparin-haldane hypothesis
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if there was appropriate supply of energy such as lightning or ultrviolet light then a wide rang organic compounds might be synthesized
OPARINS THOUGHTS- suggested that the organic compounds could have undergone a series of reactions leading to more and more complex molecules |
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evidence for biogenesis
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miller-urey experiment (based experiment off of the oarin haldane hypothesis)
-stanley miller & harold urey 195os attempted to reproduce early reducing atmosphere and produce orainic compounds from inorganic materials built a contraption somulation the early earth (methane ammonia water hydrogen lightning heat etc) after 1 week = amino acids sugars lipids & other organic molecules |
