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Biology ch 3 & 4

Biology ch 3 & 4






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  • Eleanor M. Savko 10/20/11

Biology ch 3 & 4 Biology ch 3 & 4 Presentation Transcript

  • 10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt Step 1 Step 2 Step 3 Step 4 Step 5
  • Branch of biology that deals with interactions among organisms and between organisms and their environment.
  • What is ecology?
  • The lowest level of environmental complexity that includes living and non-living factors.
  • What is ecosystem?
  • All the members of a particular species living in one area.
  • What is population?
  • The simplest grouping of more than one organism in the biosphere.
  • What is community?
  • An organism that uses energy to produce its own food supply from inorganic compounds.
  • What is autotroph?
  • A bacteria that uses chemicals to produce its food.
  • What are chemosynthetic bacteria?
  • Compared to land, open oceans are low in the level of these.
  • What are nutrients?
  • The total amount of living tissue within a given trophic level.
  • What is biomass?
  • The term for each step in the transfer of energy and matter within a food web.
  • What is a trophic level?
  • A snake that eats a rabbit that eats grass is this level on the food chain.
  • What is a secondary consumer>
  • The amount of energy that passes to the next trophic level.
  • What is 10%?
  • The type of pyramid that shows the amount of living tissue at each trophic level in an ecosystem.
  • What is a biomass pyramid?
  • What type of pyramid shows the number of organisms at each trophic level.
  • What is a pyramid of numbers?
  • A natural phenomenon that maintains the Earth’s temperature range.
  • What is the greenhouse effect?
  • The process by which bacteria convert nitrogen gas in the air to ammonia.
  • What is nitrogen fixation?
  • The result of a lake having a large input of limiting nutrients.
  • What is an algal bloom?
  • The rate at which organic matter is created by producers in an ecosystem.
  • What is primary productivity?
  • The average year-after-year condition of temperature and precipitation in a particular region.
  • What is climate?
  • A symbiotic relationship in which both species benefit.
  • What is mutualism?
  • The series of predictable changes that occurs in a community over time.
  • What is ecological succession?
  • Primary succession can begin after this.
  • What is volcanic activity?
  • In the photic zone this can occur.
  • What is photosynthesis?
  • This cannot occur in the aphotic zone.
  • What is photosynthesis?
  • Depth, flow, temperature, and chemistry.
  • What are ways aquatic ecosystems are classified?
  • An ecological inquiry method an ecologist uses when studying populations of a certain species.
  • What is modeling?