Mechanisms of speciation

Question 1

Behavioural isolation

Answer 1

Different mating behaviours differ enough to prevent speciation. i.e calls change, and only attract a subpopulation now

Question 2

btemporal isolation

Answer 2

breeding occurs at different times, leading to incompatible mating. i.e flowers bloom at different times

Question 3

ecological isolation

Answer 3

difference in habitat leads to adaptations that seperate a species. i.e altitude adaptations lead to geographical seperation

Question 4

mechanical isolation

Answer 4

anatomical changes prevent breeding with another species. i.e one insect is physically unable to mate with another

Question 5

gametic isolation

Answer 5

male gametes cannot recognize, and thus fertilize a female egg. i.e sea animals are very specific about their chemical binds

Question 6

Zygotic mortality

Answer 6

fertilization is possible, but the genetic differences result in a zygote that cannot develop

Question 7

hybrid inviability

Answer 7

a hybrid can be developed, but will die before birth or cannot survive in the wild