bio CAT 1

stupid thing

Intra-specific variation

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