Can someone put this question to rest?

Question

Here's a question about the differences of the tissues between moncots and dicots. I just don't want another wrong answer being chosen as best answer. Who's right, I'm not sure. If were both wrong vote for none of us.

Here's the link.

http://answers.yahoo.com/question/index;_ylt=Akr63hv0RQV8MyReghSh4wXty6IX;_ylv=3?qid=20080726191048AAPtwk9&show=7#profile-info-hiXFdkAWaa

Answer 1

in that case i'm fairly sure the answer the question was looking for was secondary growth (i.e. wood/cork).

as for the other differences...

embryo with single cotyledon (dicots have two)

pollen with single furrow or pore (dicots have three)

flower parts in multiples of three (dicots are in multiples of four or five)

major leaf veins parallel (whereas in dicots they are reticulated)

roots are adventitious (i.e. from the stem, whereas in dicots they develop from a radicle)

Answer 2

You are correct it is how the cells that make up the tissue system are arranged. However the word tissue refers to both the classes of tissue cells and the tissue systems made from those cells.  A dicot's vascular tissue system produces an architecture called wood, a distinct arrangement of the cells that make up the vascular tissue.

Both monocots and dicots have vascular tissue systems but they differ in their meristem (undifferentiated tissue cells) the source of the tissue system.

The difference between monocots and dicots lies in their tissue cells being organized from different locations in the respective stems. They both have xylem and phloem, tissue cell types, but the tissue origin of these cells differs, dicots grow from the circumference, and monocots from section ends. Dicots have lateral meristem, the cambium, as the source of their vascular tissue system. This results in only dicots having wood with lateral mertistemic growth that adds annual girth to the plant.

Monocots have intercalary meristem at the nodes (where the leaves attach). The intercalary meristems lengthen the plant, usually for a short time, and produce the discrete distribution pattern of their vascular tissue architecture. Some monocots (palms) do grow in girth by adding parenchyma (ground) cells and more vascular bundles from an extended intercalary meristemic region that includes the stem periphery. The result is wooden dicots and woody but flexible monocots

http://waynesword.palomar.edu/trjune99.h...

http://www.biologie.uni-hamburg.de/b-onl...

http://arnica.csustan.edu/Boty1050/Tissu...

http://www.botany.hawaii.edu/faculty/web...

http://www.emc.maricopa.edu/faculty/fara...

Intercalary meristem xylem

http://www.jstor.org/pss/2483991