GEOG 1401 UNIT 15
Evolution: changes that take place within species over time and also
the development of new species from older ones.
the idea that those better adapted to the
environment are more likely to reproduce, so the genetic makeup of
the next generation is slightly different than the previous one. The
change from one generation to the next is likely to be very small, but
over many generations, significant changes take place.
Genetic variation means that some members of a species are
more likely to survive and reproduce than others.
Micro-evolution: (change within a species) The change from one
generation to the next is likely to be very small, but over many
generations, significant changes take place
Macro-evolution: (speciation) If members of one species get
separated in two different environments, different
characteristics will be advantageous and over time, they may
evolve into different species.
Darwin & Wallace: independently developed the theory of evolution
all species of organisms arise and develop through the natural
selection of small, inherited variations that increase the
individual's ability to compete, survive, and reproduce.
15.2 Species Range
Species Range: the geographic boundary of where it is found