If you start at 8pm what time would it be after 72 hours

Regarding most of the narrator’s story, which word best describes the tone?

Where substance is produced during cellular respiration

Adescription of a type of bio biotechnology (genetic engineering, cloning, or artificial section) one benefit or one risk for the individual (based on whether you are for or against it) one benefit or one risk for society (based on whether you are for or against it) one benefit or one risk for the environment (based on whether you are for or against it)