From Notes
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| How does the earth receive its energy? | the sun
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| nutrients ___ within ecosystems | cycle
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| What is transferred in a system from one organism to another? | energy
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| The transfer of energy from organism to organism makes up the? | food chain
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| what is the bottom of the food chain? | producesr
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| how is energy lost? | life processes and loss as heat
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| What is an energy pyramid: | shows therelativea mount of energy availabe at each trophic leve.
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| How is 90 percent of energy lost? | life processes
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| What are the five nutrients that cycle through ecosystems? | hydrogen, osygen, carbon, nitroen and phosphorous
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| How much of the energy sent by the sun is available to life on earth? | 1%
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| What does the number of trophic levels depend upon? | the number of primary producers in the first trophic level
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| How big are biomes with small numbers of primary producers? | short
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| How much energy is transferred from one trophic level to the next? | 10%
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| What are the levels of organization in order? | individual, population, communitry, ecosystem, biome, and biospher
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| What makes up and ecosystem? | more than organisms, geography, weather, climate, and geologic factors influence interactions
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| What contribute to maintaining the balance of an ecosystem? | nutrient cycles
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| What is the limiting nutrient? | whatever nutrient is the most scarce
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| The limiting nutrient limits growth of what? | producers
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| What is an algal bloom? | when excess nitrogen or phosphates cuase an overgrowth of algae
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| What is a communityr | group of populations
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| what is a niche | encompasses all the aspects of an organisms way of life
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| What are the three community interactions ? | competition, predation, and symbiosis
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| What is the competitive exclusion principle | two species with the same nich will compete utnil one species is killed off
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| What is the driving force behind natural selection? |
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| what is predation | ORGANISM CAPTURES ANOTHER
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| what is the cyclical trend | too many predators
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| What is carrying capacity | max individuals supported in environment
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| What is symbiosis? | living together
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| What is parasitism | +/-
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| what is mutualism | +/+
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| what is commensalism? | +/0
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| What is succession? | change in community
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| What is primary succession | rock
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| Secondary Succession | soil
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| What is a pioneer species | first to inhabit an area
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| what is population density | number individuals per area
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| what is growth rate | increase or decrease in population size
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| Immigration | moving in
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| emigration | moving out
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| exponential growth | population grows drastically
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| logistic growth | resources become less available
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| What is the density dependent limiting factor? | factor that becomes limiting only when the population is dense
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| What is the density independent liming factor? | limiting factor that affects all of the populations no matter what their size
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