World food production has doubled in the last 40 years because of
A. genetic modifications, DNA fingerprinting, and international treaties.
B. organic farming practices, erosion control, and farm labor.
C. diseases, world trade, and new sources of water.
D. fertilizers, pesticides, and high-yielding varieties.
Answer: D
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All the different limiting factors that act upon a population are collectively known as environmental resistance.
Answer the following statement true (T) or false (F)
A specific example of an urban habitat generalist would be the ________
A) American bald eagle B) Eastern hemlock tree C) dandelion D) American chestnut tree E) white-tail deer
Which of the following describes an urban heat island?
A. It results in cities being cooler at night compared to rural areas. B. It causes a wind to flow from the city to the countryside. C. It releases more longwave radiation in the day than a nearby rural area. D. It has less evaporative cooling than nearby rural areas.
Deriving slope and aspect from an elevation raster is a ________ operation:
A. local B. zonal C. neighborhood D. global