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Top Score Question

Discussion in 'DAT Discussions' started by arpitpatel86, May 16, 2008.

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  1. arpitpatel86

    arpitpatel86

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    All of the following are true about sexual reproduction in plants EXCEPT:

    a. all plants exhibit alternation of generations

    b. the diploid sporophy generation produces haploid spores

    c. the haploid spores develop into diploid gametophyte generation

    d. spores are cells that prevent the loss of water

    e. meristems provide source of cells that can develop into an adult

    the answer was C i do agree with this answer however A doesnt seem right either bc angiosperms dont develop through alternation of generations do they?
     
    #1 arpitpatel86, May 16, 2008
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  2. Zerconia2921

    Zerconia2921 Bring your A-game!

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    Angiosperms (flowering plants) are sporophyte dominate as well ferns. Which means they start off with 2n sprophyte generation produce haploid spores (N) which later become gametes to be fertilized.

    C is correct (its false) because once you produce sproes (1N) you can't return to 2N if your a gametophyte.
    A- all plants alternate in generation. right
    B- 2n sprophyte do make 1n spores right
    D- spores conserve water
    E-meristem are capable to develop into any type of cell.
     
    #2 Zerconia2921, May 16, 2008
  3. Hugh Mannity

    Hugh Mannity

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    They do but it is highly reduced. The idea is that in the evolutionary process, the sporophyte generation becomes more dominant. Basically as you go from less advanced plants to angios, the gametophyte continually decreases relative to the sporophyte.
     
    #3 Hugh Mannity, May 16, 2008
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