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Mr. Butler
AP Biology – Mission Hills HS
AP-Biology
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Do not write on test
Ecology Unit Test
Read the question carefully
Read all answers carefully
Choose the right answer
Choose the best answer if more than one choice seems possible
1. A relationship among organisms where one species benefits while the other species neither
benefits nor is harmed is called __________.
a. predation
b. parasitism
c. commensalism
d. mutualism
e. symbiosis
2. Based on the data in the graph, which of the following statements is true?
a.
b.
Food production at 40º C is about 5 mg of glucose per hour.
Food production is the smallest at about 20º C.
c. There is no food production happens at 10º C.
d. Food production is the greatest at about 30º C.
e. Food production increases with rising temperature
3. Which of these statements is true?
a. Decomposers and carnivores are consumers
b. Decomposers are mostly plants
c. Fungi are higher order (2nd,3rd )consumers
d. Top level consumers in most ecosystems are herbivores
e. No ecosystem has more than 3 trophic levels.
4. __________ are the nonliving parts of an organism's environment.
a. Niches
b. Abiotic factors
c. Heterotrophs
d. Ecosystems
e. Biotic factors
Mr. Butler
AP Biology – Mission Hills HS
Do not write on test
5. Which of these organisms uses light energy to manufacture food for itself?
a. an autotroph
b. an omnivore
c. a heterotroph
d. a carnivore
e. plants only
6. Which of these statements is true?
a. In a pyramid of energy, about 50% of the energy at one level is available for the next
trophic level.
b. In a pyramid of biomass, the weight of a lower trophic level is the same as the level above
it.
c. The law of conservation, which can be applied to the pyramid of energy, means that
energy is constantly created and destroyed.
d. In a pyramid of numbers, the population size usually gets smaller as the trophic level
increases.
e. In a food pyramid, energy is recycled and material is lost
7. Which of these organisms breaks down and releases nutrients from other dead organisms
a. decomposers
b. herbivores
c. carnivores
d. Producers
e. scavengers
8. Based on the data in the graph, about how much annual precipitation does a taiga usually
receive?
a.
b.
no less than 300 cm
about 100-200 cm
c. about 250-400 cm
d. no more than 50 cm
e. about30-190 cm
Mr. Butler
AP Biology – Mission Hills HS
Do not write on test
9. Which of these is a characteristic of a tropical rain forest?
a. short, mild summers
b. location close to the Equator
c. populated with squirrels, bears, and deer
d. relatively few trees per hectare
e. low biodiversity
10. This graph shows annual precipitation versus temperatures for various biomes. Based on
the data in the graph, which biomes can all have an annual precipitation of 250 cm?
a. Desert, savanna, tropical rainforest
b. Savanna, temperate forest
c. temperate rain forest, tropical rainforest
d. temperate rain forest, tropical rainforest, tropical seasonal forest
e. temperate rain forest, temperate forest
11. Soil chemistry is one example of __________.
a. a density dependent factor
b. tolerance
c. a biotic factor
d. Growth factor
e. an abiotic factor
12. Which of these statements is NOT true?
a. The process of succession resulting in a climax community takes billion of years.
b. Succession happens when communities of organisms populate otherwise barren land.
c. Secondary succession happens in areas where organisms had previously lived.
d. Ecological change is mostly gradual
e. Succession happens when ecosystems are not in an equilibrium.
Mr. Butler
AP Biology – Mission Hills HS
Do not write on test
13. Based on the data in the graph, at what time of day is the dissolved oxygen level in the
ocean greater than the dissolved oxygen level in a tide pool?
a. 2:00 P.M.
b. 3:00 A.M.
c. 11:00 P.M.
d. 3:00 P.M.
e. 1:00 AM – 6:00A.M.
14. Based on the data in the graph, which of these statements is true?
a. At the beginning of the year, the housefly population is in its Log phase.
b. The population size shows a straight-line increase.
c. All of the population will be dead at the end of one year.
d.Growth of the housefly population begins to increase rapidly about 3/4 of the way through
the first year.
e. The housefly population will most likely increase indefinitely.
15. An elephant is considered to have a slow life-history pattern. Which of these
characteristics would be matched to an elephant?
a. unstable environment
b. reproduce early
c. mature quickly
d. long lifespan
e. high number of offsprings
16. What does the dotted line represent on this graph?
Mr. Butler
AP Biology – Mission Hills HS
Do not write on test
a. death rate
b. birth rate
c. carrying capacity
d. Predation
e. Fluctuation of birth and deathrate
17. Which of these is NOT a limiting or density dependent factor to the growth of a terrestrial
population?
a. availability of food
b. long-term abundance of space
c. introduction of disease
d. increasing population of predators
e. availability of oxygen
18. Which population is in the process of decreasing?
a. Rabbit
b. Cabbage
c. Ice Plant
d. Rabbits and Cabbage
19. Which of these equations represents zero population growth
a. Birthrate + Death rate < 0
b. Birthrate + Death rate = 0
c. Birthrate - Death rate = 0
d. Birthrate - Death rate > 0
e. Deathrate – Birthrate > 0
20. __________ is a density-dependent factor
a. Floods
b. Temperature
c. Drought
d. Competition
e. Light
e. Cabbage and Ice Plant
Mr. Butler
AP Biology – Mission Hills HS
Do not write on test
21. Which of these is an explanation of why a population can fluctuate once it has reached
carrying capacity?
a. All populations experience exponential growth once they reach carrying capacity.
b. A population of organisms always grows rapidly once it reaches carrying capacity.
c. Limiting factors can influence the number of organisms in a population once it reaches
carrying capacity.
d. The number of organisms decreases but never increases once it reaches carrying
e.
capacity.
The number of organisms will slightly overshoot the carrying capacity and then be
reduced due to density dependent factors until resources allow new population growth.
22. A population of rabbits experiences growth over time. Which of these statements about
that population is true?
a. The population my face decreased competition due to resource increase.
b. The population may experience exponential growth due to resource depletion.
c. The population may face increased competition due to resource depletion.
d. The population may experience straight-line growth due to resource depletion.
e. The population may face a higher death than birth rate.
23. A small population of white-footed mice has the same intrinsic growth rate r = 0.05 as
a large population. If everything else is equal,
a.
b.
c.
d.
e.
the large population will add more individuals per time unit.
The small population will add more individuals per time unit
The two populations will add equal numbers of individuals per time unit
The J-shaped growth curves will look identical
The growth curve of only the large population is J shaped
24. While climbing mountains, we can observe transitions in biological communities that
are analogous to the changes
a.
b.
c.
d.
e.
in biomes at different longitudes
in a community through a different season
in biomes at different latitudes
in an ecosystem as it evolves over time
traveling across the United States from east to west
25. A population is correctly defined as having which of the following characteristics?
I. inhabiting the same general area
II. individuals belonging to the same species
III. possessing a constant and uniform density and dispersion
a.
b.
c.
d.
e.
I only
III only
I and II only
II and III only
I, II, and III only
Mr. Butler
AP Biology – Mission Hills HS
Do not write on test