Exam 11: Biogeography

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Tiny plants and animals that float freely with ocean currents are termed _______________. ​

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plankton

Those organisms of ecosystems which feed on dead plant and animal material and waste products, promote decay, and return mineral nutrients to the soil are called _______________.

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decomposers, detritivores

A feeding pattern formed when food chains overlap and interact is called a food _______________. ​

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web

Heterotrophs that eat only living plant material are called ____. ​

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The total amount of living material in an ecosystem is referred to as the _______________. ​

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Terrestrial ecosystems are most easily distinguished from one another by the ____ that are present in that system. ​

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On a global scale, grasslands tend to be found ____. ​

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As compared to other biomes, polar regions have a lower amount of precipitation. ​

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Why do wolves have to hunt deer over a larger territory than the deer require for grazing? ​

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According to ____ Rule, the body size of warm-blooded subspecies usually increases with decreasing mean annual temperature of its habitat.

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The dominant area of a landscape mosaic is referred to as the _______________. ​

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What are two factors that control the species diversity of an island, according the theory of island biogeography? ​

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Organisms that eat both plants and animals are called _______________. ​

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Grasslands are considered abiotic. ​

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The major reason why large-scale areas of broadleaf evergreen trees occur only in the southern hemisphere is that ____. ​

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Humans have eliminated or have had a significant impact on much of Earth's natural vegetation, except in regions too remote to be altered significantly by civilization. ​

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Rainforest trees commonly depend on lianas for support because their root systems are shallow. ​

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If we study plant communities on a world-wide basis, we find they can be divided into major types of terrestrial ecosystems known as _______________. ​

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The process by which natural vegetation at a particular location undergoes a progressive sequence of different plant communities is called _______________. ​

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The primary difference between tropical and middle-latitude forests is that middle-latitude forests have developed a mechanism to counteract: ​

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