Answer the following question with at least 5-6 sentences in your own word.
compare and contrast the 19th-century treatment for sti and 20th/21st-century treatment for hiv/aids.
are we able to interrupt this pattern in the us? if so, how?

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.

sex cells are usually half's then they find another half and make a fertilize egg

some inherited genetic mutations can be good for the offspring, so the answer is different genetic mutations cause many forms of cancer.