Exam 6 Review
Supplemental Instruction
Iowa State University / Leader: / Matt
Course: / Biol 211 (1)
Instructor: / Raich
Date: / 12/5/16
3) An ecologist records 23 individuals of a rare orchid plants per square mile in a forest preserve and 2 per square mile in a nearby park. What is the ecologist comparing?
A) dispersion
B) density
C) carrying capacity
D) range
E) None of the above
4.) Resource or niche partitioning is best described by which of the following statements?
A) Species diversity is maintained by switching between prey species.
B) A climax community is reached when no new niches are available.
C) Slight variations in niche allow similar species to coexist.
D) Two species can coevolve and share the same niche.
E) Competitive exclusion results in the success of the superior species.
5.) Uniform spacing patterns observed in plants like the creosote bush are most often associated with
A) chance
B) Patterns of humidity
C) Random distribution of seeds
D) Competitive interactions among individuals
E) The concentration of nutrients
6.) Which curve best describes survivorship in elephants
A) Type 1
B) Type 2
C) Type 3
D) none
7.) Species that exert strong control over a community due to their pivotal ecological role are called:
A) Keystone species
B) Dominant species
C) Top-down species
D) Bottom–up species
8.) The conversion of light energy to plant tissue is an example of
A) secondary production
B) secondary consumption
C) primary production
D) herbivory
E) primary consumption
Population Ecology:
Dispersion - Name all three. Provide an example. Which are common/rare?
1. / 2. / 3.Growth:
· Which Demonstrates exponential growth?
Logistic growth?
· What type of conditions allow a
population to demonstrate each curve?
· As the population grows (N increases) what happens to
r on each graph?
· What is K? What is K's
significance to these graphs?