Removal of which of the following species will always result in the greatest changes in an ecological system?
A) a decomposer species
B) a producer species
C) a carnivore species
D) a competitive species
E) a keystone species
E
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Is it possible to see D from B?
The question is based on this contour line map with elevations shown in feet.
• North is to the top of the map.
• Streams are shown with dashed lines.
• A graphic scale for measuring horizontal distances is shown below the map.
• Estimate elevations between contour lines to the nearest half-contour interval; assume that the top of a
hill is one-half-contour interval higher than the highest contour line shown.
What will be an ideal response?
Which type of earthquake wave most closely resembles sound waves?
a. P-waves b. S-waves c. Love waves d. Rayleigh waves e. permanent waves
The lower atmosphere is warmed from the surface upward through longwave radiation from Earth, ____________________, and ____________________
Fill in the blank with correct word.
Species richness is affected by many variables. As one travels to higher latitudes, one would expect ________
A) the number of species to increase B) population viability to increase C) the number of species to be maintained D) other factors to be more important than latitude E) the number of species to decrease