Biology Classification

請問如果問dicotyledons 同monocotyledon 有咩external features 唔同
http://en.wikipedia.org/wiki/Monocot
Flowers: In monocots, flowers are trimerous 花瓣是三的倍數(number of flower parts in a whorl in threes) while in dicots the flowers are tetramerous or pentamerous花瓣是4或5的倍數 (flower parts are in fours or fives).
Pollen: In monocots, pollen 花粉has one furrow 坑紋or pore 孔 while dicots have three.
Seeds: In monocots, the embryo has one cotyledon 子葉 while the embryo of the dicot has two.
Stems: In monocots, vascular bundles 維管束 in the stem are arranged in a ring圓環狀, in dicots it is scattered分散.
Roots: In monocots, roots are adventitious 不定根, [即fibrous root system], while in dicots they develop from the radicle主根.
Leaves: In monocots, the major leaf veins are parallel平行葉脈, while in dicots they are reticulate網狀葉脈.
佢話可唔可以答一個係taproot system 一個係fibre root system??
可以.
呢兩樣野就咁睇睇唔睇到架?
得. 洋蔥好明顯係fibrous root. 綠豆好明顯係taproot.