And I'm really lost and anxious. When should I write what. Should I look for a specific key word or scenario in the question that would lead me to know exactly what to write about? If yes then what?
Like, what leads to what? Does Geographical Isolation lead to Reproductive Isolation or is it the other way round? How does Speciation take place and in what order?
thanks a lot in advance guys
Geographical isolation is when members of a species are physically separated by their environment - say a large pond was partially drained and became several smaller ponds, trapping fish from a single species in each. Reproductive isolation is a result of this because the fish in each smaller pond now cannot mate with fish in any of the others. If the subgroups are separated for long enough, they may genetically diverge enough to lose the capacity to interbreed, and become different species, which is what's referred to as speciation.