BIO UNIT 2

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Author:
chabby
ID:
61493
Filename:
BIO UNIT 2
Updated:
2011-01-23 15:51:54
Tags:
ecosystems
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allof unit 2
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  1. BIOTIC
    living components of the environment
  2. ABIOTIC
    non-living components, ie sunlight, water , minerals
  3. SPECIES, POPULATION, COMMUNITY, ECOSYSTEM
    • organisms able to bread with one another
    • same species living in a specific area at a certain time
    • all individuals in populations in a given area
    • communites of populations with abiotic factos that surround and affect it
  4. Explain why fungi are placed in a different kingdom than plants.
    they have different ways of obtaining food sources
  5. Distinguish between a species' habitat and range.
    • Habitat: place or area with a certain set of characteristics, both biotic and abiotic.
    • range: geographical area where the population or species is found.
  6. Sharks have an excellent sense of smell. Is this an adaptation? Explain.
    Yes, it is a behaivoural adaptation that helps keep the shark alive, as well as finding food
  7. How does sexual reproduction lead to variation amoung individuals in a population?
    the genes obtained by invidivuals through their parents are different.
  8. Explain how the ability of a population of insects to withstand the effects of an insecticide is an example of natural selection.
    The traits passed down through the anncestors to withstant the effects is helpful for surviving in a certain area or habitat suitable for the insect
  9. A farmer spends much of her time outdoors and, as a result, has very tanned skin. What would the hypothesis of inheritance of aquired characteristics say about the skin of her children?
    Her children would have tanned or darker skin because of the constant exposure to the sun would become a heritable trait for offspring.
  10. How might competition for resources lead to natural selection?
    The traits that aquire from the competition for survival become natural selection
  11. Are bird wings and bat wings homologous structures or analogous structures? explain.
    Analogous structures b/c they have the same function but a different evolutionary origin.
  12. Define speciation and the two general pathways to speciation.
    formation of a new species

    Transformation: new species formed through mutaition and replaces old species

    Divergence: more than one species emerges from the parent species
  13. How is a birds call a barrier to speciation?
    It keeps the same birds together.. attracts the same type of birds they are looking for
  14. How could the rise and fall of lake levels over a thousand years result in speciation of a population of fish?
    It makes the species adapt to the water levels and amount of oxygen :. creating a new species

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