Anthophyta Classes
Angiosperms
are the latest step in plant evolution, with flowers and fruits giving them
advantages over other plants.
Monocotyledonae
They are called monocots because one cotyledon (seed leaf) is
present in the embryo. They are also known for their parallel leaf veins. Their
vascular tissue is scattered while the root systems are fibrous. Monocot pollen
grains only have one opening and their floral organs occur in multiples of
three. An example is wheat (T. monococcum)
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Dicotyledonae
They
are called eudicots because two cotyledons (seed leaves) are present in the
embryo. They are also known for their net-like patterns on their leaves. Their vascular
tissue is arranged in a ring, with the xylem on the inside and the phloem on
the outside. They have a taproot, with lateral roots branching off. Eudicots
have pollen grains with three openings and their floral organs occur in multiples
of four or five. An example is Primula hortensis.
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