Regulating ecosystem services are ways that ecosystems control important conditions and/or processes such as ________
A) soil formation and nutrient cycles
B) aesthetic beauty and recreation
C) pollination and chlorophyll
D) climate, water flow, and disease
E) food, water, and fiber
D
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The Appalachian Mountains were formed when ________ and ________ collided more than 250 million years ago
A) North America; Africa B) Africa; Europe C) South America; Africa D) Australia; Asia
Around the world, most major cities are situated ________
A) on the more northern continents B) near mountains, usually in a valley C) at elevations above 500 m. D) along rivers, oceans, roads, or train routes E) in agricultural areas
Of all the following processes which one increases the salinity of water?
A) Precipitation B) Runoff C) Icebergs melting D) Evaporation E) Sea ice melting
Due to changes in the intensity and amount of ____, polar climates are found at high latitudes and tropical climates at low latitudes
a. ?temperatures b. ?precipitation c. ?photosynthesis d. ?solar energy e. ?evaporation