What are early peoples who moved frequently as they searched for the food they needed for survival are called?

Match each disease with the body system it affects

Group of genes that encode molecules found in all body cells, creating a biochemical “fingerprint” that serves as the “id” for cells so that they are marked as “self” a) deoxyribonucleic acid (dna) b) entry inhibitors c) major histocompatibility complex (mhc) d) non-nucleoside reverse transcription inhibitors (nnrtis)

Why does a women get a uti? what is a uti?