Lesson+Quiz+Week+7

=Distance Learning Quiz - Week 7= Below is what you submitted to dl@pisgahforestinstitute.org on Sunday, April 6, 2008 at 18:58:12


 * Topic:** Ecology
 * Subtopic:** Introduction, Biodiversity, Energy and Matter
 * Name:** Kim Collazo
 * E-mail:** kscollazo@gmail.com
 * Question 1:** Evolutionary adaptation refers to a process in which individuals in a population that are best adapted to their environment leave more offspring than others. The inherited characteristics of those who leave more offspring come to dominate the entire population, changing the genetic characteristics of the population.
 * Question 2 :** Genetic diversity refers to the diversity found within a particular species, for example eye or hair color. Species diversity refers to the many types of organisms on Earth. Ecosystem diversity refers to the various pond, forest, desert, marsh, and other unique systems found in ecosystems.
 * Question 3:** Sustaining biodiversity is important because losing diversity usually leads to extinction of some kind. From there it is a domino effect because one organism's extinction leads to the jeopardy of other systems which relied on its interconnectedness with the now-extinct organism.
 * Question 4:** Kingdom Monera differs from Kingdom Protista in that monera are unicellular microbes like bacteria/prokaryotes. Protista are unicellular or multi-cellular organisms such as algae and protozoa.
 * Question 5:** The phylum of insects in the Animal Kingdom has the most diversity. There are more than a million different species.
 * Question 6:** Autotrophs acquire energy from sunlight. They convert the energy in the sunlight into the energy stored in chemical bonds through the process of photosynthesis.
 * Question 7:** Only about 10% of energy is transferred between tophic layers. The other 90% is lost as heat during metabolism.
 * Question 8:** In extreme environments you would most likely find a simple food chain because the amount of organisms that are adapted to survive in these areas are few. For this reason, every species' survival is vital to the other living creatures in that environment.
 * Question 9:** The producers, which are chemically capable of producing their own food are located at the base of a trophic pyramid. All other organisms rely on these producers for food energy.
 * Question 10:** Energy always flows in one direction through an ecosystem. It begins with the sun's energy, which is converted to food energy by producers (plants). It is then transfered up the trophic pyramid through the various consumers. And then is finally returned to the ground through the eventual decay of the consumer, breakdown by the decomposers, and use of producers again.

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