Notincluding human intervention. Natural selection.
You can't answer this question as bird species are going extinct all the time...
If they couldn't they would be extinct, you see the mother or father, most species the female, has to give birth AKA have baby's or the species will go extinct.
Any species will become extinct in time, including humans.
It largely depends on the species of crab you are talking about. There are some species which are already extinct and there are other species which you will see every time you go to any beach.
Most of said species die, if there is a favorable mutation existent in the population that characteristic will become more prevalent. If not the species will most likely go extinct.
It largely depends on the species of crab you are talking about. There are some species which are already extinct and there are other species which you will see every time you go to any beach.
It will go extinct.
animals that depended on a species for a food source or some other need will not be able to get that need if that species is extinct, and will either have diffuculty surviving, or will go extinct.
The cockroach is not extinct. There are many different species of cockroaches, none of which are even endangered.
Go extinct.
The moose is not endangered. It is listed as a species of least concern by IUCN.
the organism has to reproduce otherwise the species will go extinct.