Jessie is working with a 100% stock concentration of Clorox. She decides to add 100 µL of bacteria to a tube containing 3 mL of nutrient broth and then adds 400µL of the Clorox stock to the tube as well. What is the unknown concentration of the tube?

The images attached are the photos of bacteria in yoghurt under a misroscope. According to these images and your own knowledge, can you make a biological drawing of bacteria in yoghurt ( in a circle) and identify the types of bacteria accurately?

Why are petri dishes ALWAYS stored and incubated upside down?   Question 17 options:   a)  helps bacteria grow   b)  the lid is larger and make the dish more stable   c)  prevents condensation from dripping on to agar surface   d)  so the label can be seen

You have several different media onto which you inoculated eight strains of yeast (A-H). The media include a rich medium, an unsupplemented minimal medium, and minimal media each supplemented with one vitamin. Of the yeast strains, one is a prototroph and seven are auxotrophs for a vitamin. After overnight incubation, the following results were observed (tan patches represent growth): D plate 1 (A) B DE F GH plate 5 plate 4 plate 6 Which plate contains an unsupplemented minimal medium? [Select] Which plate contains a rich medium? [Select] plate 2 Which strain is a prototroph? [Select] Strain E is an auxotroph for niacin. Which plate reveals this specific auxotrophy? [ Select] plate 3 plate 7 One strain is an auxotroph for both choline and pantothenic acid. Which one is this most likely to be? [Select]