This is a legacy topic. View the most up to date content by selecting the exam board in the dropdown to the left.
What is at the heart of new species formation? It all starts with a single population of a species which for whatever reason (genetic bottlenecks, founder effect, etc.) ends up being split geographically to the point where no interbreeding occurs for a certain length of time.
Given that the two habitats are different, the individuals in each population will adapt differently to counteract different selection pressures. Say for example the ants in the forest experience a warmer and more nutrient-rich surrounding compared to the emigrated ants on a nearby, although disconnected, beach.
The adaptations acquired by both populations over a long time will get increasingly disparate. When these pass a threshold, the two populations can no longer interbreed, even if the opportunity were given (due to excessive genetic difference). They have now become separate species! This process is called speciation.
wow just checked out your website and think it’s pretty cool.
Eager bug The Student Room
OMG that’s great! Actually just helped me with my homework
mabelbarc The Student Room
OMG them videos are great! You're a goldmine - and I'm a gold digger ;)
I’ve struggled so much with feeling overwhelmed with biology revision, and I don’t know where to start. But your website is just what I need! It tells me all the information I need, and the knowledge I need to then build on, and it’s written in a way that soaks straight up into my brain!
Prettyhetty The Student Room
I got A* in A-level biology (Cambridge), thanks! I love your videos
Sherif Negm Facebook