Monday 11 November 2013

MONOCOTYLEDONS AND DICOTYLEDONS PLANTS




Flowering plants (PHYLUM ANGIOSPERMOPHYTA ) are divided into two class: monocotyledons (class monocotyledoneae) and dicotyledons (class dicotyledoneae). Typically, monocotyledons have seeds with one cotyledon (seed leaf); their foliage leaves are narrow with parallel veins; the flower components occur in multiples of three; sepals and petals are distinguishable and are known as tepals ; vascular (transport) tissue are scattered in random bundles throughout the stem;and;since they lack stem cambium (activity dividing cells that produce wood) most monocotyledons are herbaceous.Dicotyledons have seed with two cotyledons;leaves are board with central midrib and branched veins; flower parts occur multiples of four or five ; sepals are generally small and and green ; petals are large and colourful ; vascular bundles are arranged in  ring around the edge of the stem ; and , because many dicotyledons posses wood-producing stem cambium, there and woody forms as well as herbaceous ones.


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