Chromosome - An organized structure of DNA and proteins within the nucleus of a cell that contains many genes.⏎
Adaptive Mutation - A mechanism through which certain cells can increase the rate in which genetic mutations occur, often in response to stress. This mechanism may help explain how bacteria develop resistance to certain antibiotics.⏎
Autoimmune Disease - An umbrella term for a range of conditions in which the immune system mistakenly attacks healthy tissue in the body.⏎