Chapter 5 Study Guide Biology Crisp
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| What is not a factor in population growth rate? | demography
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| One of the main characteristics of a population is its | geographic distribution
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| there are 150 saguaro cactus plants per square kilometer in a certain area of the Arizona desert. To which population characteristic does this information refer? | population density
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| what does the range of a population tell you that density does not? | the areas inhabited by a population
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| what tells you population density? | the number of bacteria per square millimeter
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| the movement of organisms into a given area from another area is called | immigration
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| when organisms move out of the population, this is known as | emigration
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| What must occur in a population for it to grow? | the birthrate becomes higher than the death rate
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| what is happening in a population as it decreases? | the death rate becomes higher than birthrate
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| if immigration and emigration numbers remain equal, which is the most important contributing factor to a slowed growth rate? | decreased birthrate
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| which are two ways a population can decrease in size? | decreased birthrate and emigration
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| when individuals in a population reproduce at constant rate, it is called | exponential growth
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| the various growth phases through which most populations go are represented on a(an) | logistic growth curve
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| as resources in a population become less available,the population | reaches carrying capacity
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| what factor might NOT contribute to an exponential growth rate in a given population | reduced resources
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| in a logistic growth curve, exponential growth is the phase in which the population | grows quickly
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| a biotic or abiotic resource in the environment that causes population size to decrease is a | growth factor
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| what is not a limiting factor? | immigration
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| what is not likely to be a limiting factor on the sea otter population? | drought
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| what will reduce competition within a species' population? | fewer individuals
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| if a population grows larger than the carrying capacity of the environment, the | death rate may rise
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| water lilies do not grow in desert sand because water availability to these plants in a desert is | a limiting factor
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| a limiting nutrient is to ecosystem productivity as a limiting factor is to population | growth rate
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| each of the following is a density-dependent limiting factor except (competition,seasonal cycles,crowding,disease) | seasonal cycles
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| which would be least likely to be affected by a density-dependent limiting factor? | a small, scattered population
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| what is a density-independent limiting factor? | earthquake
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| what density-dependent factor other than the predator/prey relationship affected the populations of moose and wolves on Isle Royale? | food availability for the moose and disease for the wolf
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| a disease resulting in the deaths of one third of a dense population of bats in a cave would be | density-deendent limiting factor
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| what would not be a limiting factor related to population density? | the eruption of a volcano
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| demography is the scientific study of | human population
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| demographic transition is change from high birthrates and high death rates to | a low birthrate and a low death rate
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| about 500 years ago, the world's population started | growing more rapidly
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| demographic transition begins with changes in society that | lower death rate
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| the human population experienced exponential growth after | the industrial revolution began
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| which country has not yet completed the demographic transition? | great Britain
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| the anticipated human population by the year 2050 is about | 9 billion
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| In Rwanda, there are more young children than teenagers, and more teenagers than adults. This age structure indicates a population | will double in 30 years
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| in countries like India, the human population is growing | exponentially
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| Most of the world wide human population is growing exponentially because | most countries have not yet completed the demographic transition
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| how can a diagram of a population's age structure predict how it can grow? | (it shows how many people are a reproductive ages,it shows how many people will probobly die within a few years,it shows how many people are entering the population by birth,all of the above)
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| Asian elephants are found in India ,Cambodia, Thailand, Vietnam, and Laos; this information describes the ______________ of the asian elephant population | geographic distribution
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| when an individual moves into one population from a different population, it is called | immigration
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| under ideal conditions with unlimited resources, a population will grow | exponentially
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| a population of bacteria with a limited supply of nutrients will eventually show growth typical of the ________ model | logistic
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| if an entire wolf population dies, the moose population on which it preys will grow to the environment's | carrying capacity
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| competition, predation,parasitism, and_________ are density-dependent limiting factors. | disease
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| the rise and fall cycle of a predator-prey relationship is a density-____________ relationship | dependent
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| what are 4 main characteristics of a population? | geographic distribution,density,growth rate,age structure
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| why must wild life biologists consider immigration and emigration when studying certain animals? | animals leave the area in which they were born in search of mates,food,new territories and other animals arrive from outside a population for the same reasons
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| 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
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| what are some factors that keep a population from growing further once it reaches the carrying capacity of its environment? | at the carrying capacity, competition for resources, predation, parasitism, disease, and other density-dependent factors keep the population from growing further.
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