Polymers are everywhere in nature: hair, nails, even wood. Use the Internet or your local library and nd ve other useful, naturally occurring polymers not mentioned in the book. You should be able to nd ve easily. There are many thousands of examples! Explain how the five that you found are useful

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.

the sun creates it's own light, also gives light and life to bunch of stuff like plants,animals,humans etc.photosyntesis is the process of making food which needs sun,water,nutrients etc.