No. You're mixing up "want" and "can't". When you can't breed, then you're a different species.
Because that is how evolution works. If one species adapts, it can eventually become so different as to be unrecognisable for what it was (given enough time). recent common ansester
They diverged enough so that they can't crossbreed.
Because a niche is an organisms place in an ecosystem, specific to only that organism and including its job and what is eats or is eaten by. Two different organisms can have similar niches, but they cannot have the exact same one.
Over billions and billions of years, an entire species slowly develops characteristics that they need to adapt to current conditions. If this is repeated enough times, a new species completely different from the original can "form". Or if you're really religious, your God makes new species or whatever.
e. you need to be know enough detail as to how much they are 'closely related'. Its simply because organisms even thought they belong to same genus, might not be 'closely related' as you want. For example: Bacteria belonging to different species within a genus cause different diseases.
Because that is how evolution works. If one species adapts, it can eventually become so different as to be unrecognisable for what it was (given enough time). recent common ansester
According to the biological species concept, when the new species no longer can interbreed with the ancestral species, or with the population that it has been geographically isolated from long enough to have allele change significantly enough to prevent interbreeding.
No.
It doesn't know, it can't know, it has no intelligence. However when populations become isolated long enough to diverge enough, they are different species.
Geographic isolation is a way in which a new species can form. Isolation over a long enough period of time can result in a species evolving to have different traits.
a new species might form when a group of individuals remains sparated from the rest of its species long enough to accumulate different traits
No. Chickens and ducks cannot create offspring. They are totally different species and do not share enough chromosomes in their DNA to produce a chicken/duck hybrid.
They diverged enough so that they can't crossbreed.
If they have enough resources in order for all the different owls to live in the same area. I hope this help.
because there is not enough variation within the species to allow it to evolve to the changing environment :)
It is different because the earth wasn`t ready enough to face the sun It is different because the earth wasn`t ready enough to face the sun
Organisms are grouped into species according to their outer similarities so ducks and geese must vary enough to be categorized differently.