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20 Cards in this Set

  • Front
  • Back
change over time
Biological Evolution
change in species from previous existing species
(Relative Dating)
using rock layers to determine relative ages
Radioactive dating
use of radioactive elements to determine the age
Atomic number
number of protons
Mass number
number of neutrons and protons
element with different atomic mass
unstable isotopes
stable isotopes
half life
amount of time it takes for the parent to decay in half
Homologous structures
same from, different function
Vestigal structure
structure no longer used
Analogous structure
same function, different form
Geographic Isolation
changes have occured to adapt to the environment
Natural Selection
organisms with traits well suited to an environment survive and reproduce; strong survive; survival of the fittest
Darwin's Theories 1
Variation exist among individuals within a species and between spieces
Darwin's Theories 2
Organisms produce more offspring than the environment can support
Darwin's Theories 3
Competition exists among individuals
Darwin's Theories 4
The organisms whose variation best fit them to the environment are the ones who are most likely to survive and pass on their genetic information
Individuals do not evolve
Populations evolve