Evolution Flashcards
uses the decay of radioactive isotopes to measure the age of the rock.
Radiometric Dating
is a method used to determine the age of rocks by comparing them with those in the original isotope to decay
Ralitive Dating
is the amount of time it takes for half of the original isotope to decay
Half-Life
Are the smallest unit of geologic time lasting several million years
Epoch
is a unit of geologic time consisting of two or more periods that lasts hundreds of millions of years
Era
are divisions of geologic time lasting tens of millions of years
Period
the process of directed breeding to produce offspring with desired traits, referred to as selective breeding
Artificial Selection
those less equipped would die
Natural Selection
changes in groups of organisms through time
Evolution
anatomically similar structures inherited from a common ancestor
Homologous
are structures that are the reduced forms of functional structures in other organisms
Vistigial Structures
used for the same purpose and can be superficially similar in constructs inherited from a common ancestor
Analogous Stuctures
is the measure of the relative contribution an individual trait makes to the next generation
Fitness
a trait shaped by natural selection to increase the survival or reproductive success of an organism
Adaptation
each characteristic
Trait