In an ecosystem that undergoes a sudden drastic change, what characteristic of the ecosystem would most likely ensure that at least some species survive the change? * 1 point Few species and small population. Great biodiversity and variation among individuals in a species. Low biodiversity and little variation within a species. Few species that are high specialized for survival in their present environment.

When changes to either abiotic or biotic factors affect an entire ecosystem, ecological succession occurs.

correct answer is option a.

tropopause, stratopause and mesopause have all in common aspect that is point of maximum temperature in its layer of the atmosphere. all layers of atmosphere observe abrupt change in temperature. tropopause is the boundary between troposphere and stratosphere. stratopause is the boundary between stratosphere and mesosphere. mesopause is the boundary between mesosphere and thermosphere. these all boundaries are ranges between altitude of 0 to 80 km.

the answer is d. chordata