Why does the author introduce the grandmother with her comments about the misfit

Summarize the work of famous environmental scientists of the past.

The different forms of a gene for a given trait are called .

Which statements are true for invasive species? 1. they always stabilize an ecosystem. 2. they’re always successful in adjusting to a new habitat. 3. they often compete with the native species for resources. 4. they have the ability to displace the native species. 5. they’re always pests.