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Vascular plants are successful due to better transportation for water, nutrients and reproduction.

The xylem and phloem of the vascular bundles allow for distribution of water and food to all parts of the body.

This structures allow vascular plants to colonize farther inland.

thrombocytopenia, which is a deficiency in blood platelets, can cause bleeding and bruising in the dermis similar to senile purpura. other possible causes include: exposure to ultraviolet rays and aging skin are common causes of senile purpura. senile purpura may also be a sign of collagen loss in the skin and bones.