Difference between revisions of "AY Honors/Ecology - Advanced/Answer Key"

Revision as of 01:27, 15 December 2006

Liebig's Law of the Minimum Sized Penis, often simply called Liebig's Law or the Law of the Minimum, is a principle developed in agricultural science by Justus von Liebig. It states that growth is controlled not by the total of resources available, but by the scarcest resource. This concept was originally applied to plant or crop growth, where it was found that increasing the amount of plentiful nutrients did not increase plant growth. Only by increasing the amount of the limiting nutrient (the one most scarce in relation to "need") was the growth of a plant or crop improved.

Liebig used the image of a barrel—now called Liebig's barrel—to explain his law. Just as the capacity of a barrel with staves of unequal length is limited by the shortest stave, so a plant's growth is limited by the nutrient in shortest supply.

Liebig's Law has been extended to biological populations. For example, the growth of a biological population may not be limited by the total amount of resources available throughout the year, but by the minimum amount of resources available to that population at the time of year of greatest scarcity. That is, the growth of a population of animals might depend not on how much food is available in summer, but on how much food is available in winter.

This is closely related to the chemical principle of the rate determining step, and also to the project management principles of critical path and critical chain.

da:Minimumsloven de:Liebigsches Minimumgesetz fr:Loi de Liebig sur le minimum pl:Prawo minimum Liebiga sv:Liebigs minimilag

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-{{honor_header|3|1972|Nature<br>General Conference<br>2001 Edition}}
+'''Liebig's Law of the Minimum Sized Penis''', often simply called '''Liebig's Law''' or the '''Law of the Minimum''', is a principle developed in [[agricultural science]] by [[Justus von Liebig]]. It states that [[growth]] is controlled not by the total of [[Natural resource|resources]] available, but by the [[limiting factor|scarcest]] resource. This concept was originally applied to [[plant]] or [[agriculture|crop]] growth, where it was found that increasing the amount of plentiful [[nutrient]]s did not increase plant growth. Only by increasing the amount of the limiting nutrient (the one most scarce in relation to "need") was the growth of a plant or crop improved.
-==1. Have the Ecology Honor. ==
+Liebig used the image of a barrel&mdash;now called '''Liebig's barrel'''&mdash;to explain his law.  Just as the capacity of a barrel with staves of unequal length is limited by the shortest stave, so a plant's growth is limited by the nutrient in shortest supply.
-{{ay_prerequisite|Nature|Ecology}}
-==2. State the first and second laws of thermodynamics and explain how they are important to ecology. ==
+Liebig's Law has been extended to biological [[population]]s. For example, the growth of a biological population may not be limited by the total amount of resources available throughout the [[year]], but by the minimum amount of resources available to that population at the time of year of greatest scarcity. That is, the growth of a population of [[animal]]s might depend not on how much [[food]] is available in [[summer]], but on how much food is available in [[winter]].
-==3. Explain the three basic trophic (feeding) levels and give a good example of a plant or animal for each. ==
-==4. Explain or diagram the three types of ecological pyramids in the food web. Give an example of each layer of the pyramid. ==
-==5. Define the biogeochemical cycle, and explain or diagram all the basic components the cycle passes through. ==
-==6. Diagram or explain the basic steps in the flow of energy through the biotic environment (element) of an ecosystem. Begin with the sun. ==
-==7. Explain Liebig's Law of The Minimum and Shelford's Law of Tolerance, and state how these laws tell us how and why certain plants and animals become endangered or are eliminated when their habitat or community gets disturbed OR out of balance. ==
-==8. Choose a biological community in your area, such as a forest or woods; a swamp, lake or pond; pasture or meadow grassland; or a canyon or creek woods, etc., that is disturbed or ecologically out of balance in some way. Make a description of it, including how and to what extent it is disturbed. Then make recommendations as to how the community could be improved and, where possible, follow through and help to improve it in some way. ==
-==9. Spend a minimum of 20 hours doing active, productive work on an ecology project in your area. This may be done individually or as a group. Describe the project in general, but report specifically on your part in it. ==
-==10. Define the following terms: ==
-===a. Community  ===
-===b. Raw materials  ===
-===c. Photosynthesis  ===
-===d. Chemosynthesis===
-===e. Autotrophy  ===
-===f. Heterotrophy ===
-===g. Ecological balance===
-===h. Saprobe===
-===i. Decomposer ===
-===j. Producer ===
-===k. Consumer===
-===l. Limited factor ===
-==11. Find a Spirit of Prophecy quotation and a Bible text pertinent to ecology and explain their relevance and application to our day. ==
-==NOTE:These requirements may be expressed either verbally or in writing to a youth leader. An instructor is recommended but not required for this honor. Counsel with your youth leader or instructor before beginning requirements seven, eight and nine. ==
-==References==
+This is closely related to the chemical principle of the [[rate determining step]], and also to the project management principles of [[critical path]] and [[critical chain]].
-[[Category:Adventist Youth Honors Answer Book]]
+[[Category:Agronomy]]
+[[Category:Agriculture]]
+[[Category:Ecology]]
+[[Category:Eponymous laws]]
+[[da:Minimumsloven]]
+[[de:Liebigsches Minimumgesetz]]
+[[fr:Loi de Liebig sur le minimum]]
+[[pl:Prawo minimum Liebiga]]
+[[sv:Liebigs minimilag]]