When a population stops growing and its size no longer fluctuates, it is said to
A. be at stable equilibrium.
B. be at the lag phase.
C. be at the death phase.
D. have met its biotic potential.
Answer: A
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For the following acid-base reaction, identify what compound is formed in the space marked. HCl + KOH ? ???? + H2O
A. KOH2 B. KOH2Cl C. H3OCl D. KCl E. none of the above
Matching
1. On the ecological succession figure, choose the letter that represents the step in which shrubs grow. 2. On the ecological succession figure, choose the letter that represents the initiation of secondary ecological succession. 3. On the ecological succession figure, choose the letter that represents a mature forest of hardwoods. 4. On the ecological succession figure, choose the letter that represents the step in which perennial weeds and grasses are plentiful. 5. On the ecological succession figure, choose the letter that represents the stage in which the land can support trees, shrubs, weeds, and grasses.
Switching to integrated pest management in the United States
a. will be easy to do because it is very simple b. is hindered by government subsidies for using chemicals and by opposition from chemical manufacturers c. is difficult because it only works for a few pests d. is strongly opposed by environmentalists e. is easy to accomplish but is opposed by organic farmers
Which one of the following is a major cause of global topsoil loss?
A) Erosion via water and wind B) Rising ocean levels C) Construction of new buildings and roads D) Creation of new mines