Organic Variation Flashcards

Terms Definitions
Theory
well supported testible explanation of phenomena that have occured in the natural world
fact
a truth known by actual experience or observation
Oparin/Haldanes theory
-molecules concentrated into organic soup
-organic molecules more and more condenced to make first cell
stanley miller
tested oparin/haldanes theory in the lab
prokaryotic
unicellular organism lacking a nucleus, simple cells
heterotrophic
organism that obtains energy from the foods it consumes
anaerobic
process that doesnt require oxygen
geology
science that deals with the history of the earth
Darwins theory of evoloution
theory that the earth was old and changing
fossil
preserved remains or evidence of an ancient organism
Ice, sap, tarpits, sed rock, quick sand
how fossils form
relative dating
age of a fossil determinded by comparing its placement with that are fossils in other layers of rock
radioactive dating
allows paleontologists to estimate a fossils age compared with that of other fossils, utilizes half life breakdown
embryology
Early development, show unity and diversity
homologous sturctures
common ancestory/ different adaptaions
vestigial structures
structure that serves no useful purpose
DNA/RNA/proteins
molecular compunds that can show unity/ diversity of life
analogous structures
different ancestory with similar adaptaions
Species
group of similar organisms that can breed and produce fertile offspring
population
group of individuals of the same species that live in the same area
speciation
formation of new species
geographic isolation, behavioral isolation, reproductive isolation
3 ways that speciation can occour
Divergent evolution
single species evolves into several different forms that live in different ways
convergent evolution
process which unrelated organisms independently evolve simularities when adapting to similar environment
population size is large, no mutations, no natural selection
3 of 5 conditions that must be met in order for a population to be in Hardy weinberg equilibrium
Hutton
earth is shaped by geological forces, took place over extrememely long periods of time, geology
Malthus
human population will grow faster than the space and food supplies needed to sustain it
Lamarck
inheritance of aquired traits,first to propose a mechanism explaining how organisms change over time
lyell
processes occuring now have shaped earths geological features over long periods of time, geology
wallace
writes to darwin, specualting on evoloution by natural selection based on his studies of the distribution of plants and animals
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