Match each front with its description

Stationary: When a cold air mass and a warm air mass meet and do not move

Warm front: When a warm air mass slides over a cold air mass

Cold front: When a cold air mass slides under a warm air mass

Occluded front: When two cold air masses force a warm front up and block it

Explanation:

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.

not sure if this is what you'r looking for eubacteria and archaebacteria