Which of the following is true of agricultural land in North America?
A) Today, agricultural land continues to increase
B) Today, agricultural land continues to decrease
C) Today, growing forests are being replaced by agricultural land
D) Food production continues to decrease in the last 50 years
E) Most of the wheat and oats used on this continent is imported from Europe
Question 2
Which of the following is not one of the soil forming factors?
A) climate
B) topography
C) biological activity
D) time
E) season of year
Resource partitioning among five species of warblers feeding in North American spruce trees.
Major trunk lines carrying long-distance traffic crisscrossed the area east of the Mississippi. The
A recruiting poster for the “True Sons of Freedom” encouraged African Americans to enlist. In fact,
Ice cores: Periods of rapid climate change especially in North Atlantic
North American temperate deciduous forest. Forest soil profile at right.
A land snail (Helix aspersa) with the opening that leads to its lung visible at the left.