Summary: Bio 223 Midterm

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  • 1 Bio 223 Midterm

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  • Some plants have leaves modified into thread-like, clinging structures that they wrap around other plants or non-living structures to support the plant.  These leaves are:

    Tendrils
  • Some tropical trees have roots that grow out of the trunk and branches, grow downward until the meet the ground or some other object (like another tree or a large rock...), and then grow tightly around that object to support the plant.  These roots are:

    Strangling Roots
  • Brian planted onions in his garden.  Assuming the roots are growing in the correct direction (down), which of the following would be found deepest in the ground (furthest from the surface of the soil)?

    Zone of cell division
  • In a soil profile, this is mainly partially broken rock, parent material for the layers above it.

    C-layer
  • Some plants, such as corn and some tropical palms, grow rings of roots from the stem above ground that then extend into the soil to support the plant.  These roots are:

    Haustoria
  • The products of photosynthesis are transported via phloem sap.  This process is known as:

    Translocation
  • a ring of microtubules within the cell membrane that predicts the future plane of cell divison

    Preprophase Band
  • having structural or chemical differences at opposite ends of a cell or organism

    Polarity
  • cell fate is determined by where the cell is in relation to other cells in the plant

    Position-based differentiation
  • cell fate is determined early in development and passed to daughter cells

    Lineage-based differentiation
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