OT: Differences between Monocots & Dicots


The differences that I am aware of are that:

in dicots both seed leaves (cotyledons) develop, 
growth is from the tip (allowing extensive branching), 
leaves can be complicated in shape, 
and flower parts come in fours or fives;

in monocots one seed leaf fails to develop, 
growth is from the base (leading to simple branching or none), 
leaves are simple (generally sword shaped), 
and flower parts come in threes. 

I am curious as to whether there is a single cause for all 
of these characteristic differences (at least some of which 
have exceptions), or is the grouping just the luck of the draw? 

Gerry, who tends to wax philosophical/scientifical when there
is little iris bloom (only I. unguicularis currently)
-- 
gcsnyd@loop.com    AIS Region 15
Warm, winterless Los Angeles
President of San Fernando Valley Iris Society
My work?  Helping generate data for http://www.jpl.nasa.gov/galileo



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