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Test 1
Test 2
Test 3
Test 4
Test 5
100
The number of organisms per unit area
What is population density
100
_______________ is a group of the same species in the same place at the same time.
What is population
100
Limiting factors can be abiotic or biotic. True or False
True
100
Japan had a birthrate of eight and a deathrate of nine in 2008. What was the PGR?
-1 %
100
The study of ________________ helps to predict changes in human population
What is demographics (demography)
200
any factor in the environment that does not depend on the number of members in a population per unit area
What is density independent factors
200
What are the three types of plant and animal dispersion?
What is clumped, random, and uniform
200
Give an example of a density independent factor.
What is any natural disaster or weather event.
200

When a country goes from having a high birthrate to a low birthrate, this is called....

Demographic transition

200
Exponential growth in human population is due to
technology advances
300
the number of individuals moving away from a population
What is emmigration
300
Which event is correlated with the beginning of exponential growth in human population? a. the start of the Industrial Revolution b. the invention of agriculture c. the bubonic plague epidemic d. the end of the Second World War
What is a. the start of the Industrial Revolution
300
Give an example of density dependent factor
parasites, predation, competition etc
300
To assess a population’s growth rate, an ecologist must know how many individuals are born, how many died, and how many move away in a given period of time. What else must an ecologist know? a. how many individuals find mates b. how many individuals move in from somewhere else c. how many individuals carry communicable diseases d. how many individuals are young or old
b. how many individuals move in from somewhere else
300
The vibrant colors of a coral reef bring what quality to an ecosystem?

aesthetic 

400

What is an example of an r-strategist?

Fly, mouse, etc

400

What is an example of a k-strategist?

elephant, human
400
Which of the following statements is correct? a. Population size of predators increases when their prey is scarce. b. Competition for resources is density-independent when food is plentiful. c. Disease is density-dependent because transmission occurs more easily when a population is large. d. A change in average temperature is a density-dependent factor because fewer organisms can acclimate to variations in temperature.
c. Disease is density-dependent because transmission occurs more easily when a population is large.
400
Young adult male chimpanzees look for mates outside their own population. The males then take the females back to their group. Which of the following occurs in females’ original population? a. emigration c. mortality b. immigration d. natality
a. emigration
400

The process of substances rich in nitrogen and phosphorus, such as animal waste, fertilizers, and sewage, flow into waterways causing excessive algae growth is called 

Eutrophication 

500

the pattern of spacing of a population within an area

What is dispersion

500
Suppose in a population of 1000 wild horses, there are 400 births and 220 deaths. Also, 180 new horses join the population from an area that was destroyed by fire, and 380 horses are captured by park rangers. Describe the overall change in this horse population.
Because a total of 580 horses are added and a total of 600 horses are lost, the population decreases by 20 individuals. Mathematically, the population decreased by 20/1000 or 0.2%.
500

The process of toxins accumulating as you move up the food chain is refered to as 

Biological magnification 

500
How does the logistic model of population growth differ from the exponential model? a. The exponential model shows a restricted growth rate. b. The logistic model considers the environment’s carrying capacity. c. The graph of the exponential model is S shaped. d. The graph of the logistic model has a longer lag phase.
b. The logistic model considers the environment’s carrying capacity.
500
Define zero population growth
when birth rate equals death rate and immigration rate equals emmigration rate