Over time, one group of squirrels becomes separated from another group. due to erosion and the subsequent formation of a river, the squirrels are unable to cross. the geographic barrier prevents breeding between the 2 groups of squirrels. which term could be used to describe each group of squirrels?

1. population
2. ecosystem
3. community
4. species

what school and grade?

succession returns a disturbed

ecosystem to a more stable state. this is also classified into two (2) types:

primary succession and secondary succession. the primary succession arises when

a new land is transformed and a bare rock has been exposed providing an environment

that can be occupied for the first time. while, secondary succession occurs

when a previously occupied environment was disturbed that kills much of all its

community

explanation: