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Discussion in 'DAT Discussions' started by arpitpatel86, Jun 1, 2008.

  1. arpitpatel86

    arpitpatel86 2+ Year Member

    May 9, 2008
    destroyer 200

    Which statement is false?

    A. if two organisms occupy the same niche, the will compete for food
    b. if two organisms occupy the same niche, they will mate at the same of the year
    c.the clmax community is the most stable community marked by a large biomass w/ no env. changes
    d. the role that an organism occupies within an ecosystem is its niche
    e. All are true

    can some1 please explain C to me....i thought two organisms cant occupy the same niche let alone mate at the same time?
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  3. Ghettob1aster

    Ghettob1aster Ninja 2+ Year Member

    Apr 9, 2008
    B is true because if there were two organisms that occupied the same niche they would do everything exactly the same. I think that kaplan may have mentioned that this is almost impossible? If not, it's really unlikely for it to happen, because one species would probably kill the other one off. So you can think of two species occupying the same niche as being some ideal theory, not something that could actually happen.

    C is the definition of climax community. I think that I read a volcanic erruption example somewhere. Some smaller bactera live on the hardened lava rock, plants follow, animals come to eat the plants, animals come to eat the animals. These rapid changes go on until a stable ecosystem is formed, like a forest or something. The forest is the climax community.
  4. Sea of ASH

    Sea of ASH 2+ Year Member

    Sep 15, 2007
    i think they are referring to two organisms within the same species

    based on the competitive exlusion principle, two species that compete for the same niche cannot coexist
  5. gkhan

    gkhan 2+ Year Member

    May 27, 2008
    climax community is when you get tall large (hence large biomass) trees come in to an area to stablize.
    bacteria->lichens->grasses-> small trees -> large trees

    bacteria allow lichens which break rocks/minerals = soil, grasses grow, attract insects and birds, so you get seeds of small trees, and those provide environment for large trees to come in (oaks, etc)

    2 species can not coexist in the same niche, usually one specialize or both specialize.
  6. bumpski20

    bumpski20 2+ Year Member

    Sep 2, 2007
    if one said the answer is E, that all are true...wouldnt that technically be saying the statement "all are true" is a false statement? :laugh:
  7. Sea of ASH

    Sea of ASH 2+ Year Member

    Sep 15, 2007
    hahahahahah never thought of it that way

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