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Dichotomous Key January 24, 2006

Posted by flutterby in Plant Bio.
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1. Alive at maturity – 4
1. Dead at maturity – 2

2. Function is conducting things throughout plant – Xylem
2. Function is strength and support – 3

3. Have secondary walls and is star-shaped – Sclereids
3. Have secondary walls and is long & slender – Fibers

4. Occurs in fruits – 5

5. Function is transport – Phloem
5. Function is storage & photosynthesis – Parenchyma

4. Occurs in stem, petiole or leaf – 6

6. Function is support – Collenchyma
6. Has a specialized function – 7

7. Regulates gas exchange from inside to outside – Guard cells
7. Prevents water loss – Trichome

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Comments»

1. Chris - January 24, 2006

very good start. a few comments – part 4 could be more specific since, technically, all of these cells fit the first description (throughout plant body). also, phloem is involved in transport, not support.

2. flutterby - January 24, 2006

is this better?


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