39. A teacher prepares agar for six petri dishes on which to grow E. coli bacteria.
The table shows the contents of the agar in each petri dish.
Contents of Agar
Beef Broth Chicken
Broth
Saline
Group
Petri Dish
Condensed
Milk
Х
1
Yes
Yes
No
No
X
2
No
Yes
No
No
Y
3
Yes
Yes
Yes
No
4
Y
No
Yes
No
Yes
z
5
Yes
Yes
Yes
No
Z
6
No
Yes
No
Yes
Based on the information in the table, which of the following questions is the
experiment designed to test?
A. Can different bacteria live on agar containing proteins?
B. Will agar containing salt prevent bacteria from growing?
C. What type of agar is best for growing E. coli?
D. Does E. coli grow at different rates?
Answers: 3
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39. A teacher prepares agar for six petri dishes on which to grow E. coli bacteria.
The table shows...
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