speciation

Question 1

what is speciation

Answer 1

speciation is the evolution of new species

Question 2

stage 1 - isolating mechanisms

Answer 2

speciation occurs after part of a population becomes isolated by an isolation barrier, this can be: geographical, ecological or behavioural

Question 3

geographical isolation

Answer 3

features like rivers, deserts, oceans and mountains

Question 4

ecological isolation

Answer 4

different habitats, breeding areas, ph and salinity

Question 5

behavioural isolation

Answer 5

differences in timing, location or complexity of mating rituals

Question 6

stage 2

Answer 6

different mutations occur in each sub - population

Question 7

stage 3

Answer 7

natural selection selects for different mutations in each group, due to different selection pressures

Question 8

stage 4

Answer 8

each sub - population evolves until they become so genetically different that they are two different species