The abundance of a given species is governed by the tolerance limits of environmental factors affecting reproduction and/or the ability to survive. in the optimum tolerance range, species reproduce and survive , hence, species are . in zones of physiological stress, species reproduce and survive , and they are . in zones of intolerance, species reproduce and survive with , and they are .

Dunkin' donuts is expanding in several different countries. its stores offer curry doughnuts in india, dulce de leche doughnuts in peru, and cherry brandy doughnuts in germany. this is an example of segmentation based primarily on:

1. in recent lessons, you have been reading about some of the challenges and issues that the united states faces in both foreign and domestic affairs. review your notes from chapters 39–41 and make a list of these issues. make sure you review the looking to the future and charting future courses sheets from the divisions and new realities lessons. of all the challenges and issues that the united states faces, which do you believe is the most serious in terms of foreign affairs and which in terms of domestic affairs? choose one of each and write an essay that describes each issue and explains why you believe it is the most serious. there is no right or wrong answer—you will be graded, in part, on how well you make the argument that each issue you chose is the most serious. refer to the rubric and scoring instructions on the next page to see how your teacher will grade this assignment.

Cultures are influenced by many different factors, including a constant flow of ideas, goods, and people. what is one of the major ways that people influence culture?