Multiple Choice
The density of Douglas firs in an old-growth forest is estimated by counting the Douglas firs in four sample plots of 1 hectare each. The number of fir trees in the plots is 10, 12, 7, and 11, respectively. What is the estimated density of firs in the forest?
A) 5 trees per hectare
B) 10 trees per hectare
C) 20 trees per hectare
D) 25 trees per hectare
Correct Answer:
Verified
Correct Answer:
Verified
Q46: If a population has a birth rate
Q47: Thanks to a new conservation program, a
Q48: In terms of population dynamics, "boom-and-bust" cycling
Q49: Examine the age structure of Germany in
Q50: Which action will likely decrease a population's
Q52: A survivorship curve is a graph that
Q53: An ecologist hypothesizes that predation by a
Q54: Which example is most clearly a case
Q55: A human population will achieve zero population
Q56: If a population of 5,000 zebras is