Science B3

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Anonymous
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296358
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Science B3
Updated:
2015-02-20 08:00:52
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Science B3
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Science B3
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  1. Species
    Group of organisms that can interbreed and produce fertile offspring.
  2. Adaptation
    Features which help an organism survive better in its enviroment.
  3. Variation
    Difference between members of species or population.
  4. Natural Selection
    A process in which individuals that have certain inherited traits tend to survive and reproduce at higher rates than other individuals because of those traits.
  5. Selective breeding
    The breeding of individuals with desirable characteristics by human choice.
  6. Evolution
    The process by which species gradually change over time. May produce a new species.
  7. Biodiversity
    Number of different species living in a specific area.
  8. Extinction
    The process of when a species dies out.
  9. Classification
    The categorization of organisms into defined groups on the basis of identified characteristics.
  10. Resources
    A need of most species found in the surrounding environment.
  11. Interdependence
    Oragnisms depending on each other. Would be unable to exist or survive without each other
  12. Ecosystem
    All the different organisms living together in a particular environment.
  13. Food Chain
    A series of steps in which organisms transfer energy by eating and being eaten. Usually, no more than five steps.
  14. Energy Flow
    The movement of energy, which originally comes from the sun, from one organism to another.
  15. Carbon Cycle
    Photosynthesis removes CO2 from air, but is added into the air due to cellular respiration, volcanoes also release CO2 as do the burning of fossil fuels
  16. Nitrogen Cycle
    Nitrogen enters via nitrogen fixation and bacteria converts it to usable forms, ammonification then decomposes organic nitrogen to NH4+ (Ammonium), nitrification then converts that into NO3 (Nitrate) by nitrifying bacteria.
  17. Nitrifying Bacteria
    Turn ammonia in decaying matter into nitrates.
  18. Decomposers
    Micro-organisms, such as bacteria and fungi, which release enzymes onto dead material and cause it to be broken down.
  19. Nitrogen-fixing Bacteria
    Turn atmospheric Nitrogen (N2), into nitrogen compounds that plants can use.
  20. Denitrifying Bacteria
    Turn nitrates back into nitrogen gas (N2). This is of no benefit to living organisms.
  21. Non-living Indicator
    A method used to measure environmental change. This can be; Temperature, Nitrate levels, Carbon dioxide levels.
  22. Living Indicator
    A method used to measure environmental change. This can be; Lichen, Mayfly Nymphs, Phytoplankton.
  23. Sustainability
    Meeting the needs of today's population without harming the environment so that future generations can still meet their own needs.

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