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Ecology 3
Test Description: Biomes/populations
Instructions: Answer all questions to get your test result.
1) The symbiotic relationship between a flower and the insect that feeds on its nectar is an example of
A
parasitism
B
commensalism
C
predation
D
mutualism
2) What is one difference between primary and secondary succession?
A
Secondary succession begins on soil and primary succession begins on newly exposed surfaces
B
Primary succession is slow and secondary succession is rapid
C
Secondary succession begins with lichens and primary succession begins with trees
D
Primary succession modifies the environment and secondary succession does not
3) Which biome is characterized by very low temperatures, little precipitation, and permafrost?
A
desert
B
tundra
C
temperate forest
D
tropical dry forest
4) Which of the following is NOT one of the factors that play a role in population growth rate?
A
immigration
B
death rate
C
emigration
D
demography
5) There are 150 Saguaro cactus plants per square kilometer in a certain area of Arizona desert. To which population characteristic does this information refer?
A
population density
B
growth rate
C
geographic distribution
D
age structure
6) The movement of organisms into a given area from another area is called
A
emigration
B
carrying capacity
C
immigration
D
population shift
7) Which are two ways a population can decrease in size?
A
high death rate and immigration
B
immigration and emigration
C
low birth rate and emigration
D
emigration and high birthrate
8) The various growth phases through which most populations go are represented on a (an)
A
population curve
B
exponential growth curve
C
normal curve
D
logistic growth curve
9) A biotic or an abiotic resource in the environment that causes population size to decrease is a
A
limiting factor
B
carrying capacity
C
growth factor
D
limiting nutrient
10) If a population grows larger than the carrying capacity of the environment, the
A
death rate may rise
B
birthrate must fall
C
death rate must fall
D
birth rate may rise
*select an answer for all questions
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