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Why couldn't mars support life? |
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Definition
Its water may have been to salty and acidic |
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Term
Four characteristics that make life work on Earth |
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Definition
Reproduction allows it to spread exponentially Life uses various energy sources: plans sunlight, animals use plants Life pollutes: organisms create waste in small amounts ok in large amounts not good at one point to much oxygen on earth Life is versatile: different roles, evolution to use unexploited resources |
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Term
What does the biosphere consist of? |
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Definition
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Term
What are the three other spheres? |
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Definition
atmosphere, hydrosphere, lithosphere |
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Term
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Definition
individuals that if interbred would produce viable offspring |
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Term
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Definition
all individual of one species in a certain area |
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Term
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Definition
all individuals of a type of species in a certain area |
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Definition
structurally distinct plant community |
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Term
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Definition
community of living organisms and their physical enviroment |
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Term
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Definition
all Living organisms have a quadratic tolerance curve showing the ability to tolerate different environmental states, low tolerance population is low, high tolerance population is high where curves over lap there is much competition and were they don't there is no competition |
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Term
What is the ecological optimum point? |
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Definition
where tolerance is highest; the independent variable value where dependent variable growth and abundace are greatest |
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Term
Describe the three species interactions |
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Definition
competion is a lose lose predation is a win lose mutualism is a win win |
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Definition
3 levels primary is photosynthesis, next its herbavors then carnivors each succedeing level gets 10% less biomass due to respiration and that the whole orgainism may not be digested |
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Definition
highest near the equator lowest near the high latitiudes because more NPP in the lower equator means more plants and more animals and because species evolve to specialize on certain abundant food types in high NPP areas |
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