Then it would be the end for that species in one generation.
If all individuals in a species were sterile the species would become extinct
Then it would be the end for that species in one generation.
If individuals in a species never reproduce ,it would mean an end to that species on earth
They cannot. Should the sperm and egg of these two species meet, nothing will happen. Nature does not allow it. Only animals of similar genus - like lions and tigers, or horses and donkeys, can conceive outside their species. Most of the time their offspring is sterile.
No, they would not. Further to that, they could not. They are genetically too different to have a sterile child between them. (This is opposed to a horse and an ass which while different species can create sterile mules.)
If there were no pioneer species there wouldn't be any species ya see
Nothing would happen, they are different species and therefore cannot breed.
The species would die out.
One species would be forced to leave.
One species would be forced to leave.
If species disappeared from an ecosystem the balance in the ecosystem will be altered.
i think that there will be no humans on earth