what is phylogenetics
the study of evolutionary relationships
give 3 advancements that have improved classification
developments in microscopy
developments in biochemistry
new dna evidence
describe the process of natural selection
populations are naturally varied due to random genetic mutations
some of these mutations provide a selective advantage
these organisms survive and reproduce, passing on the successful genes
define evolution
evolution is a change in the genetic makeup of a population over time due to natural selection
give 2 pieces of evidence for evolution
fossils
antibiotic resistance
describe how antibiotic resistance arises
a random genetic mutation causes a bacterium to become resistant to the antibiotic
when thee antibiotic is used, all the bacteria that do not have the mutation are killed
the population containing just thee resistant bacteria then begins to grow
describe how two new species develop form one species
a population is split where members of the population are isolated
the environments become different and so natural selection will occur differently
the two groups will become different enough that they cannot breed to produce fertile offspring anymore
why was Darwin’s theory only slowly accepted
most people still believed god created all the life on earth
there was insufficient evidence to support his theory
