By Allan B. Cobb
This encyclopedia set, a part of the Macmillan technological know-how Library sequence, is designed to deal with middle-school scholars via university undergraduates. The paintings includes nearly three hundred signed entries on numerous subject matters in relation to animal technological know-how, together with animal improvement, services, habit, ecology, and evolution.The connection among animals and people can also be explored in entries equivalent to Animal checking out, Apiculture, and household animals. additionally incorporated are biographies of famous scientists who've made ''significant contributions'' to the sector (for example,Henry Walter Bates, Rachel Carson, Gregor Mendel) in addition to introductions to occupation possibilities within the comparable disciplines. Articles look in alphabetical order and variety in size from numerous paragraphs to a number of pages. All are followed via see additionally references and extra examining feedback (including net sites). each one quantity starts off with a whole desk of contents, a geological time scale, 5- and six-kingdom type comparisons, a phylogenetic tree of existence, and a chart of measurements, abbreviations, and conversions. each one concludes with an issue outline,an index (volume four features a cumulative index), and a 600-plus-word thesaurus.
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Almost all government agencies and many businesses are required by law to file these statements, which state the potential harmful environmental effects of such activities as opening new factories, building dams, and drilling new oil wells. The 1990 Pollution Prevention Act created a new office in the Environmental Protection Agency, with the mission to help industries limit pollutants. Additional laws to protect the environment were passed in the 1970s and 1980s, including the Clean Air Act, the Safe Drinking Water Act, and the Comprehensive Environmental Response, Compensation, and Liability Act, known as Superfund.
It would not work, for example, in territorial species, where individuals tend to remain near their territories. capture-recapture method a method of estimating populations by capturing a number of individuals, marking and releasing them, and then seeing what percentage of newly captured individuals are captured again The birthrate of a population describes the number of new individuals produced in that population per unit time. The death rate, also called mortality rate, describes the number of individuals who die in a population per 25 Population Dynamics King penguins survey the scene at St.
Life history strategies methods used to overcome pressures for foraging and breeding In k-selected species, population density is more stable, often because these species occupy fairly stable habitats. Because k-selected species exist at densities close to the carrying capacity of the environment, there is tremendous competition between individuals of the same species for limited resources. Consequently, k-selected individuals often have traits that maximize their competitive ability. Numerous biological traits are correlated to these two life history strategies.