Question

please help me with letter B.

Value Ulla ination of Living EXERCISE 3: MICROE b. Holding the flask at an angle, remove the stop- per with the fourth and fifth fingers of your oth- er hand. Heat the mouth of the flask by passing it through the flame three times (FIGURE 2a). Why is it necessary to keep the flask at an an- gle through this procedure? (a) Remove theflask. c. Remove the cover from the first dish with the hand holding the stopper. Quickly and neatly pour melted nutrient agar into the dish until the bottom isjust covered to a depth of approx- imately 5.0 mm (FIGURE 3.2b). Keep the flask at an angle, and replace the dish cover; move on to the next dish until all the agar is poured. d. When all the agar is poured, gently swirl the agarin each dish to cover any empty spaces;do not allow the agar to touch the dish covers. e. To decrease condensation, leave the Petri plate covers slightly ajar for about 15 minutes until the agar solidifies. f. Place the empty flask in the discard area. 2 Culturing microbes from the environment: a. Design your own experiment. The purpose is to sample your environment and your body.Use your imagination. Here are some suggestions: Environmental Sample Lab or washroom Inoculate a plate from an envi- (b) Remc nutrienta

Answer 1

(B) It is necessary Gt is necessary to keep the flask at this angle because it reduces the chances of the contamination in the culture. chances of contamination from the air is very much reduced as it near to the flame so sterile environment created