Which factors did not influence the economic development of the united states?

a. strict immigration laws

b. transportation technology

c. an abundance of land

d. an economic system based on capitalism

The authors use the word “backbone” in lines 3 and 39 to indicate that

Jim has found that he must consume 2,300 calories a day to reach his health goals, but he doesn't want to give up his afternoon snack of pretzels. unfortunately, he tends to eat the entire bag — which amounts to 1,300 calories! what strategy should jim use to improve his habits?

In this food web, which group would increase in number if snakes were eliminated? a. producers b. decomposers c. primary consumers d. secondary consumers e. tertiary consumers