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15 Cards in this Set
- Front
- Back
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How does plant growth occur?
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by cell division (mitosis) and enlargement (by water uptake)
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Plants indetermintate (continuous) growth occurs where?
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In the meristem
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What are Meristems?
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Meristems - are sites of active cell division (mitosis) that are made up of permanently embryonic cells
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Give me four characterstics of meristems
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1.) regular shape, small size, prominent nuclei
2.) small vacuoles; cytoplasm appears dense 3.) undifferentiated (lack of structual complexity) 4.) Thin primary cell wall only |
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What do microtubules do?
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dictate the arrangement of the cellulose microfibrils of the next cell plate
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Where does primary growth occur?
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At the tips of stems and roots.
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How do the vascular tissues in monocots grow?
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Monocots - scattered througout the stem
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What does a vascular bundle contain?
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A xylem and a phloem
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Primary Root is developing tissue from...
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The radicle (the "first root")
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What does root hair do?
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Increases surface area of root so it can absorb more water.
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Name the 3 zones in a root, starting up from the root cap
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1.) Zone of Cell Division
2.) Zone of Elongation 3.) Zone of Maturation (here is where root hair can be found) |
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What is the innermost layer of the cortex?
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The Endodermis.
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Where do lateral roots arise from?
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The pericycle
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Name 3 purposes of roots
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1.) Abosorption
2.) Anchorage 3.) Storage |
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What is so special about Aerial roots?
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They are negative geotrophic....
which means.. they grow upwards (this helps them to avoid being water saturated) |
