Download Unit 7 Review - 2 - Iowa State University

Unit 7 Review
Supplemental Instruction
Iowa State University
Leader:
Course:
Instructor:
Date:
Chelsey
BIO 211 (3)
Colbert
12/7/11
1. When needed resources are unevenly distributed, organisms show a(n) ________
dispersion pattern
a. Clumped
b. Random
c. Uniform
d. Exponential
2. Herring gulls fiercely defend the areas around their nests in breeding colonies. Within
the colony they would show a ______ dispersion pattern.
a. Uniform
b. Random
c. Dense
d. Clumped
3. The sum of all Earth’s ecosystems is called the…
a. Stratosphere
b. Hydrosphere
c. Biosphere
d. Troposphere
4. Bat colonies in a cave during the day would illustrate a ______ dispersion pattern.
a. Uniform
b. Even
c. Random
d. Clumped
5. When the per capita birth rate equals the per capita death rate…
a. A population grows rapidly
b. The size of a population remains constant
c. A population is in danger of extinction
d. A population undergoes up-and-down cycles
6. A population will always grow exponentially…
a. If it is limited only by density-dependent factors
b. Until it reaches carrying capacity
c. If there are no limiting factors
d. If it shows logistic growth
7. Which of the following populations exhibits exponential growth?
a. A protozoan population in a sealed glass culture
b. A fruit fly population that recently arrived on an island previously occupied by
only plants
c. A population of deer in an area with many hungry wolves
d. A queen ant that moves to a new area to start a new colony
8. No population can grow indefinitely. The ultimate size of any population is limited by…
a. Its birth rate
b. Its death rate
c. The carrying capacity of its environment
d. Reproductive isolation
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9. A population that is growing logistically…
a. Grows fastest when density is lowest
b. Has a high r
c. Grows fastest at an intermediate population density
d. Grows fastest as it approaches carrying capacity
10. Which of the following would most likely be an example of a density-independent factor
limiting population growth?
a. Food availability
b. Diseases
c. Parasites
d. Daily temperature extremes
11. The cyclic growth exhibited by populations of showshoe hares in the North America
taiga most likely results from…
a. Predation by lynx
b. Fluctuations in the hare’s food
c. Hunting by humans
d. A and B
12. The niche of an animal is…
a. The number of individuals of the species the environment will support
b. The same as its habitat
c. The way the animal fits into its environment
d. Its den or nest
13. When goats were introduced to a new island, the goats inhabited the same areas and ate
the same plants as the native deer. The deer population dwindled and finally
disappeared. This is an example of…
a. Commensalism
b. Succession
c. Herbivory
d. Competitive exclusion
14. Certain species of acacia trees have hollow thorns that house stinging ants, which attach
anything that touches the tree. The ants feed on nutrients produced by the acacias. This
is an example of…
a. Mutualism
b. Predation
c. Competitive exclusion
d. Commensalism
15. What is the key difference between a keystone species and a dominant species?
a. There is no difference. The two terms are synonymous.
b. Dominant species alter the structure the or dynamics of the environment; keystone
species are the most abundant
c. Dominant species are the most abundant; keystone species exert control through
important roles or niches
d. The removal of a dominant species from a community has more impact than
removing a keystone species
16. In the North Pacific, sea otters are keystone predators. A reduction in their numbers has
resulted in what changes in the marine community?
a. Competitive exclusion reduced species richness
b. Mutualism among prey species maintained species diversity
c. The absence of a keystone species decreased community diversity
d. Resource partitioning allowed otherwise competing species to coexist
17. Which statement below correctly describes conditions on a glacial area during the reign
of pioneer species?
a. Aldars predominate the landscape
b. Sphagnum moss becomes established and kills trees by acidifying the soil
c. The landscape is covered by lichens, liverworts, mosses, and fireweed
d. The area is dominated by members of the genus Dryas
18. Temperature, precipitation, sunlight, and wind are the major components of…
a. Biomes
b. Dispersal
c. Climate
d. Ecosystems
Match 19-25 with the following descriptions (a-g).
19. Ecosystem –
20. Entropy –
21. Detritivores –
22. Net Primary Production –
23. Trophic-level Transfer Efficiency –
24. Biomes –
25. Climate –
a. Any of the world’s major ecosystems, classified according to the predominant
vegetation and characterized by adaptations of organisms to that particular
environment
b. The sum of all the organisms living within its boundaries and all the abiotic
factors with which they interact
c. Much less energy (~10%) available to sequentially higher trophic levels; the
amount of energy at a trophic level that is acquired by the trophic level above and
incorporated into biomass
d. The prevailing weather pattern in a given region
e. Consumers that feed on dead organisms or the wastes of living organisms
f. The degree of disorder of a system
g. Gross primary production minus the energy lost in plant cellular respiration
26. Which of the following stores chemical energy in NPP?
a. Detritovores
b. Autotrophs
c. Carnivores
d. Herbivores
27. Which of the following is the most productive ecosystem (per unit area, not considering
how much is present on Earth)?
a. Tropical rainforests
b. Temperate deciduous forest
c. Open ocean
d. A and C
28. Which of the following is least productive (per unit area)?
a. Tundra
b. Desert
c. Open Ocean
d. All of the above
29. Which of the following ecosystems has the greatest total NPP?
a. Open ocean
b. Coral Reefs
c. Tropical Rain Forests
d. A and C
e. All of the above
30. Which of the following is not a limiting factor for NPP for both terrestrial and aquatic
ecosystems?
a. Temperature
b. Moisture
c. Light
d. Nutrients
31. What of the following forms of nitrogen can be used by living organisms?
a. N2
b. NO3
c. NH3
d. None of the above
32. Which of the following processes is not how CO2 gets from the Earth to the atmosphere?
a. Photosynthesis
b. Decomposition
c. Deforestation
d. Burning Fossil Fuels
e. Cellular Respiration
33. What is the current general trend of CO2 concentration in the atmosphere?
a. Increasing
b. Decreasing
c. Constant
d. Oscillating
34. Energy ______ _______ an ecosystem and chemicals ________ ________ an ecosystem.
a. Cycles within, flow through
b. Flows through, cycle within
c. Flows through, flow through
d. Cycles within, cycle within
35. The majority of the atmosphere is
a. O2
b. CO2
c. N2
d. NO2
36. Currently, carbon dioxide is present in the atmosphere at a level of about
a. 300ppm
b. 285ppm
c. 380ppm
d. 450ppm
37. Carbon dioxide and temperature are
a. Inversely proportionate
b. Directly proportionate
c. Are not related at all
d. Historically have both been increasing since before the dinosaurs
e. Historically have both been decreasing since before the dinosaurs