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Ch. 8/9 Test

Essentials Env Science

What's an example of a population? All the maple trees in a forest
What organism has the highest reproductive potential? bacteria
What describes the number of individuals per unit of area? density of a population
What would most likely cause a large number of density-independent deaths in a population? winter storm
What has the greatest effect on reproductive potential? reproducing earlier in life
What is the carrying capacity of an environment for a particular species at a particular time determined by? the supply of available resources
A population's _________ is usually described as even, clumped, or random dispersion
The maximum number of offspring that each member of a population can produce is the population's ________________ reproductive potential
The _________ of an ecosystem for a particular species is the maximum population that the ecosystem can support indefinitely. carrying capacity
The amount of food available for wolves in an area determines the ecosystem's carrying capacity for wolves and is an ______ resource for wolves independent
Deaths that are caused by a disease spreading through a population are density ______ dependent
A population's growth rate is its ________ rate minus its _____ rate. birth; death
A population has a ____ growth rate when the death rate is higher than the birth rate. negative
If a pair of mice finds a place to live with plenty of food and no predators, the population of mice will probably undergo ________ growth. positive
What is one of the main properties used to describe a population? number of species
Professionals who study and make predictions about human populations are called _______ demographers
the 1991 cholera outbreak in Lime, Peru was caused by ______ lack of clean water
What is a reason that wood is considered a limited resource in many developing countries? fuelwood allows people to purify their water by boiling it
Countries with high growth rates usually have an age structure that has _________ more younger people
What would cause a population to decrease in a region? increased emigration; decreased fertility rate, decreased survivorship
An increase in population could result from increased birth rate, _______, or immigration. life expectancy
The ___________ is the average number of children each parent much have in order to replace themselves in a population. replacement level
A shortage of ______ can decrease the food supply available to a growing population. arable land
The study of human population patterns is called ___________ demography
The percentage of members of a group that are likely to survive to any given age is called _______________________ survivorship
A population with high fertility will have an age structure with a higher percentage of ____ people. young.
Countries experiencing the greatest population growth are most likely to those going through an __________ revolution. industrial
Wealthy, developed countries such as Japan and Germany are in the _______ _revolution where the population size begins to decline. post-industrial
_____ reproductive patterns are best described by a large number of small offspring with no parental care. r
______ reproductive patterns are best described by larger and fewer offspring with invested parental care. K
Created by: dcrovato



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