Anything from zero to 100%.
Anything from zero to 100%.
Endagered
As habitats disappear, the species that live in those habitats vanish. In addition, development often splits ecosystems into pieces.
what might cause a culture today to decline or disappear
you might not have tamed them. Otherwise, it might be a bug.
It depends of "as a fraction" of what? A day, a year, a century, a second - each of these will give a different answer.
it will disappear
mmm
why
aspen
Sometimes positive variation can improve some ability of the species adapted to the environment. For example, a kind of virus can be killed by medicine A. A small part of the virus has some variation that make it can be alive with medicine A. The species of the virus can exist in future, or it will disappear in the future in the environment full of medicine A. Besides, positive variation can provide some capacity for the species to get more resource in the competition. Of course, there is negative variation that might contribute to the disappearance for the species. That is just another side of variation.
You might be trying to spell species."I wonder what species this animal is?"Or you might be trying to spell spices."There are too many spices in this curry"