Population test
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What is a population? | the number of individuals of a particular species that are found in an area.
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| Density is ___ | the number of individuals per unit area or per unit volume at a given time.
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| Age Structure is ____. | the relative proportions of individuals of each age.
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| What is exponential growth? | Growth at a constant rate of increase per unit time.
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| Arithmetic growth_____ | growth that increases at constant amount per unit time.
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| What is Biotic potential? | the maximum rate in which a population can increase
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| What has high biotic potential? | microorganisms
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| Density Independent | any characteristic that is not affected by population density
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| Examples of density independent | Lightning, hurricanes, floods, snowstorms, and fires
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| Density dependent | referring to any characteristic that varies with population density
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| Density dependent mechanisms tend to ___________ | reduce population size by decreasing or increasing mortality as population size increases
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| intraspecific interactions | individuals within a population that can also compete for resources
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| R selected species | The production of numerous small offspring followed by exponential population growth is the defining characteristic; little or no parental care; low ability to compete
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| K selected species | large offspring, lower population growth, high parental care
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| Type I curve | EX: elephant
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| Type II curve | EX: lizards, and many birds
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| Type III curve | EX: oysters, seastars, sea urchins, weeds
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| growth rate | r=b-d
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| S Curve | these populations are grown in constant environment lacking predators and competing species that may reduce growth of the populations, conditions that rarely occur in nature
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| a population that grows rapidly at first and then levels off at carrying capacity | logistic equation
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| The logistic growth model differs from the exponential growth model in that it | expresses the effects of population-limiting factors on exponential growth
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| biotic potential of a species is influenced by | when reproduction begins, how often the organism breeds, and how many offspring are produced during each reproductive episode
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| Density Dependent Factors | Competition for Resources; predation; toxic wastes; intrinsic factors; territoriality; disease
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To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
Jojotierra
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