You Culture the Milk in Petri Dishes

Zack confidently picks up a petri dish. "Watch," he says.

You watch as he sterilizes a nichrome loop, dips it into Evil Milk A, and deftly smears it across the agar in the dish. Then he repeats the process with another dish, using Good Milk B. He labels the dishes PDA and PDB.

"Now what?" you ask.

"Now we wait for something to grow."

Continue investigating the biology lab

An Access Excellence Science Mystery sponsored by Genentech, Inc.