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Ch. 8/9 Test
Essentials Env Science
| Question | Answer |
|---|---|
| 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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