a tissue sample being kept alive during transport to a burns unit

a hydroponic bed where every seedling has wilted overnight

an incubator whose oxygen keeps pooling at one end

an altitude training camp tracking why athletes fade after an hour

a wound culture being grown to patch a graft

a school microscope being set up for a first look at onion skin

\frac{SA}{V} = \frac{6}{l}

a tissue-culture lab sizing agar cubes for a diffusion trial

a nature walk sorting a collection tray back at the classroom