Intra-specific variation
variation between the same species
inter-specific variation
variation between different species
causes of variation
genetic and environmental
first step in evolution by natural selection
a random mutation occurs
second step in evolution by natural selection
the organisms with the mutations are better suited to their environments
third step in evolution by natural selection
this would increase their chance in survival
fourth step in evolution by natural selection
giving them more opportunities to reproduce
fifth step in evolution by natural selection
and pass their successful genes to their offspring
sixth step in evolution by natural selection
overtime, beneficial characteristics become more common and the species evolve
mutation
change in the DNA sequence of a gene
variation
a different version of something
environment
your surroundings where you operate
survival
the state of continuing to exist
reproduce
production of offspring
genes
a part of a DNA sequence
evolution
change in characteristics of a species over time
natural selection
survival and reproduction of species
allopatric speciation
new species arrive because of geographic isolation, forcing the species to evolve differently from each other
sympatric speciation
new species arrive because of reproductive isolation, meaning certain animals just dont want to reproduce with each other
first step in the process of speciation
a population becomes separated
second step in the process of speciation
the two areas are different from each other, different food, different terrain, different predators
third step in the process of speciation
in the two new areas the desirable characteristics are now different
fourth step in the process of speciation
a random mutation occurs in one population which gives them an advantage in the new area
fifth step in the process of speciation
the organisms with the new mutation now outcompete others in their species, and reproduce to pass the characteristics to their offspring
sixth step in the process of speciation
if this happens enough times, the two populations would not be able to reproduce and create fertile offspring. They are different species
Studied by 80 People