1. A small, scattered population
Which would be least likely to be affected by a density-dependent limiting factor? A large, dense population or a small, scattered population
A small, scattered population

2. Two ways a population can decrease in size?
decreased birthrate and emigration

3. increase exponentially.
Suppose that a species of fish is introduced into a new environment in an attempt to reduce the population of insects. The fish has no natural predators in the new environment. The fish population would most likely
increase exponentially.

4. density-dependent limiting factor.
A disease resulting in the deaths of one third of a dense population of bats in a cave would be
density-dependent limiting factor.

5. The pattern of spacing between individuals across the range of a population is its
distribution.

6. Something that controls the growth or size of a population is
a limiting factor.

7. How would you describe a population that is decreasing in size?
The death rate is becoming higher than the birthrate.

8. a logistic growth curve.
The various growth phases through which most populations go are represented on
a logistic growth curve.

9. If you know the range of a population, then you know
the areas that are inhabited by the population.

10. During some kinds of population growth, the size of each generation of offspring is larger than the generation before it. So, as the population gets larger, it grows more quickly. This situation is called
exponential growth.

11. Demography is the scientific study of
human populations.

12. The movement of organisms into a range is called
immigration.

13. If the death rate of a population is greater than the birthrate, the population
decreases

14. There are 150 Saguaro cactus plants per square kilometer in a 10-square-kilometer area of Arizona desert. To which population characteristic does this information refer?
population density

15. ____________ __________limiting factors affect all populations, whether the population size is two or two hundred.
Density-independent

16. When you graph a population’s exponential growth over time, you will have an _________ graph.
J-shaped

17. ___________ growth occurs when a population’s growth slows or stops, following a period of rapid growth.
Logistic

18. The __________ model of population growth accounts for the influence of carrying capacity.
logistic

19. An indication that a country has completed the demographic transition is a ____ birthrate and a _____death rate.
Low, low

20. Emigration can cause a population to ____________________ in size.
decrease

21. Scientists who study human populations and predict the growth rate of the world and of individual countries study the science of ____________________.
demography

22. A population of bacteria with an unlimited supply of nutrients will eventually show ____________________ growth.
exponential

23. If a population is undergoing logistic growth, it may have a growth rate near zero once the ____________________ has been reached.
carrying capacity

24. Identify 3 limiting factors that depend on population density.
Density-dependent limiting factors become limiting only when the population density—the number of organisms in a given area—reaches a certain level. These factors include competition, predation, parasitism, and disease.

25. Identify 3 limiting factors that do not depend on population density.
Density-independent limiting factors affect all populations in similar ways, regardless of population size. These limiting factors include weather, natural disasters, and certain human activities, such as damming rivers and clear-cutting forests.

26. List the three patterns of distribution.
Random, uniform, clumped

27. List the four factors that affect population growth.
birth rate
death rate
immigration
emigration

28. Compare and contrast the graph of exponential growth to the graph of logistic growth.
The pattern of exponential growth is a J-shaped curve. The pattern of logistic growth is an S-shaped curve.

29. What will reduce competition within a species’ population?
Fewer individuals