Skin cancer, uncontrolled cell growth leading to the formation of malignant tumors, is caused by damaged DNA, trigger mutations, or genetic defects.
Answer:anatomy molecular biology and direct observation. Fossils could be an answer to
Explanation:They all have proven that they have similar traits and dna
Poisonous and toxic gases can be released
or the water that was evaporated could have pullution in them and stored in clouds