Most biodiversity hot spots are in the _____.
  • tropics
  • fragmentation
  • soil that has washed into the ocean
  • the eutrophication of
From 1940 to 1970 fire ants spread through many southern states, sometimes at a rate of 100 miles in a year. What was the cause of their spread over this distance?
  • burning for agricultural purposes
  • being transported along with plants and soil
  • soil that has washed into the ocean
  • a natural spread
Fertilizer runoff can result in _____ a lake.
  • soil that has washed into the ocean
  • the eutrophication of
  • tropics
  • greater than its reproductive rate
What is the cause of the red color of the waters about Madagascar?
  • burning for agricultural purposes
  • Biological magnification
  • soil that has washed into the ocean
  • greater than its reproductive rate
What is a lemur?
  • a primate only found on Madagascar
  • burning for agricultural purposes
  • greater than its reproductive rate
  • soil that has washed into the ocean
As of the time of the writing of Activity: Introduced Species: Fire Ants, fire ants have caused about _____ deaths in the United States.
  • 20 ( As of the time of the writing of Activity: Introduced Species: Fire Ants, fire ants have caused about 20 deaths in the United States.)
  • burning for agricultural purposes
  • being transported along with plants and soil
  • fragmentation
A sink habitat is where a subpopulation's death rate is _____.
  • burning for agricultural purposes
  • greater than its reproductive rate
  • a primate only found on Madagascar
  • soil that has washed into the ocean
In 1958 federal law restricted the movement of soil and plants from areas where fire ants were established. Why was this law unsuccessful in stopping the spread of fire ant colonies?
  • being transported along with plants and soil
  • setting baits that kill the queen when they are carried back to the nest, applying chemical powders that kill the colony, introducing a protist to infect the fire ant queen and her eggs, and introducing a fly that lays eggs in fire ants so that the eggs will hatch into larvae that eat their way into the ants' heads, which will then fall off
  • 20 ( As of the time of the writing of Activity: Introduced Species: Fire Ants, fire ants have caused about 20 deaths in the United States.)
  • People were unaware of the federal law and, when they moved, transported plants bearing fire ant colonies; a single mated queen can be transported without being noticed; and many states thought to be free of fire ant colonies already had them.
The human population of Madagascar doubles about every _____ years.
  • fragmentation
  • soil that has washed into the ocean
  • 80
  • 25
_____ is the increase in pesticide concentration as the pesticides pass up a food chain.
  • Biological magnification
  • burning for agricultural purposes
  • fragmentation
  • soil that has washed into the ocean
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