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Sudden changes in environmental conditions.
The rate of extinction is faster.
Typically, cold-blooded animals are more likely to survive mass extinctions than their warmblooded counterparts. Animals who are lower in the food chain are also more likely to survive. Mass extinctions, however, vary in their causes, and so also vary in their effects.
an increase in competition between the deer
they make the species more likely to survive.(apex)
Mass extinctions occur when the conditions on Earth change faster than species can adapt. Since humans have greatly changed the conditions on Earth and continue to change them at rapid rates, a mass extinction is a likely possibility if nothing is done to reverse or stop the changes (mainly the amount of carbon dioxide being released to the atmosphere). Another common cause of mass extinctions are extraterrestrial which cannot be predicted and are somewhat spontaneous.
Have desendants that survived several mass extinctions Most likely had a single flattened shell Likely had the gills and anus located posteriorly while the mouth and nerve ring were located anteriorly
Because of their inability to reproduce rapidly, "k"-selected species tend to be more sensitive to change and are, therefore, less able to adapt to a rapidly changing environment. This is what makes them susceptible to endangerment. - See more at: http://www.chacha.com/question/why-are-pest-species-likely-to-be-extreme-r%26%2345%3Bselected-species#sthash.E2Anrl2s.dpuf
Have descendants that survived several mass extinctions Most likely had a single flattened shell Likely had the gills and anus located posteriorly while the mouth and nerve ring were located anteriorly Yes it is all of these
larger populations
Hurricanes because it covers the most land.
Unborn children are most likely never going to be on an endangered species list because they aren't in danger of disappearing from the planet.