Mutagens are agents that cause mutations and are commonly linked to diseases like cancer. Research on specific types of mutagen and discuss how it mutates the cells and or body. Ex: Agent Orange used in Vietnam.

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.

this is more of a statement than a question. is there answers to go along with this, or is it opinion based?

i think it is d. objects resist changes in their state of motion.