Ferns and mosses are reproduced by . 

Spores

this protocol provides a detailed procedure for nucleoprotein extraction from cultured cells and tissues in an efficient manner.

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.