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