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Stack #171041

QuestionAnswer
What is dispersion? spatial distribution of individuals within a population
B =? births
What is growth rate? number per unit time
What is the unit for population density? number of individuals per unit area or volume
What are two ways population size can be populated? 1. count the number of individuals2. estimate individual number, sampling
what are three characteristics of a population? 1. size2. density3. dispersion
What is a population? two or more members of a species in an area per unit time
what is a hunter-gather lifestyle? humans live in small nomadic groups obtaining food by hunting
what is the agricultural revolution? profund changes in life, stablize/increase abailable food supply
what is logistic growth? model of a population group where birth and death rates vary by population size and equal carrying capacity
what are limiting factors? factor restraining the growth of a population
what is inbreeding? mating with relatives
what is immigration? movement of individuals into a population
what is exponential growth? model of population growth whereas birth and death rates are constant
what is emigration? movement of individuals out of a population
what are density-independent factors? reduce population in small proportions regardless of population size
what are density-dependent factors? reduce limitations; caused by increasing population
what is carrying capacity? the number of individulas the environment can support over a long period of time
what is a survivorship curve? group of a species mortality-rate data
what is population density? how crowded a population is at a specific place at a specific time
Name three Characteristics of a species must produce fertile offspring, same type of organism, be able to mate
This is a main reproductin isolation mechanism that plants use chemicals
main reproduction isolation mechanism, if all else fails dna match and chromosome number
b-d+i-e is what formula? population size formula
What does N stand for? changes in population; change
What is age structure? Shows how an ages are different within different time periods; showing which populations had more females than males vice versa and so on
name 3 age structure diagrams bell shape urn shape pyramid shape
what is a pyramid shaped diagram and what countries does it represent? A pyramid shaped diagram shows third world countries, these countries are moderatly just developing countries
What is the mortality rate? death rate
What are three characteristics of a population? density, size, dispersion
What is population density? amount of things per unit area
What is the unit for population density? amount per area squared
Name four population dynamics immigratiion emigration death rate birth rate
What is birth rate? The amount of births in one area over a period of time.
What is death rate? The amount of deaths in one area over a period of time.
What is population growth? How a population grows over time
What is demography? The study of population growth, the study of age structure diagrams
What is the hunter gatherer lifestyle? People living in small communities/packs gather food either by hunting animals or gathering berries from the forests
Name three factors leading to change in agricultural lifestyle new way for gathering foodstablizied agricultural growthnew ways of finding food
Exponential growth curves are known as what? J curves
why is there exponential growth? developing countries just starting outplentiful amount of resources
Logistical growth curves are known as what? s curves
What does K stand for? carrying capacity
What is environmental resistance? the space in between the logistical growth diagram and the exponential growth diagram
What is biotic potential? how much a female organism is able to produce
How many survivorship curves are there? three
Created by: twilightfan24
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