Term
| True or False: Earth's natural "insulation blanket" is the Biosphere. |
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Definition
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Term
| True or False: Carbon dioxide, methane, and water vapor trap light energy. |
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Definition
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Term
| True or False: The amount, intensity, and duration of sunlight striking Earth vary with latitude. |
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Definition
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Term
| A symbolic relationship between organisms in which one species benefits and the other is neither helper nor harmed is mutualism. |
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Definition
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Term
| True or False: An existing community is gradually replaced by another community in an ecological succession. |
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Definition
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Term
| True or False: The number of individuals per unit area is a population's growth rate. |
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Definition
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Term
| True or False: If the death rate of a population is greater than the birthrate, the population shrinks. |
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Definition
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Term
| True or False: There are about four million births per year in the United states. This statistic is a population dynamic called growth rate. |
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Definition
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Term
| True or False: Under conditions of logistic growth, population size witll rise and fall around an average point called the carrying capacity. |
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Definition
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Term
| True or False: One of the best-known mechanisms of population control is the parasite-host relationship. |
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Definition
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Term
| True or False: Predators can limit the size of populations by weakening their hosts, resultiin in disease or death. |
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Definition
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Term
| True or False: Human activities, such as damming rivers, are density-independent limiting factors. |
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Definition
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Term
| True or False: Density-dependent limiting factors affect all populations, whether the population size is two or a hundred. |
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Definition
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Term
| True or False: The size of the human population tends to increase with time. |
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Definition
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Term
| True or False: The human population grew slowly from the beginning of human existence, and then began to grow exponentially about 200 years ago. |
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Definition
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Term
| True or False: The popoulation of a country whose age structure has many more children than people over 40 years of age will probably decrease rapidly in the future. |
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Definition
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Term
| True or False: An indication that a country has completed the demographic transition is a low birthrate and a low death rate. |
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Definition
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Term
| True or False: The intensive farming practices of the green revolution let to the use of beneficial insecticides. |
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Definition
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Term
| True or False: Acidic gases are released into the air by combustion processes such as the burning of fossil fuels. |
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Definition
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Term
| True or False: Wetlands such as swamps can help purify water passing throught them. |
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Definition
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Term
| True or False: Most crop plants have wild relatives with useful traits such as resistance to disease. |
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Definition
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Term
| True or False: Biodiversity is important to humankind because we are part of it and dependent on it for our own survival. |
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Definition
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Term
| True or False: An introduced species can drive and invasive species to extinction. |
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Definition
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Term
| True or False: A result of global warming might be a rise in sea level. |
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Definition
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