Plants make food (sugar) using sunlight, carbon dioxide from the air, and a) oxygen. b) seeds. c) soil. d) water.

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.

sex cells are usually half's then they find another half and make a fertilize egg