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Unit 19: Biology Part 2 Page 118 of 137

c. A deck of cards represents an antibiotic. Each card is one dose
of medicine.
2. Place 52 coins on a table in the following amounts: 30 pennies, 12
nickels, 6 dimes, and 4 quarters.
3. Shuffle a deck of cards.
4. Pull the top card. This one card is one dose of antibiotic, and will kill
one bacterium. Follow these rules to determine which bacterium dies.
a. Any card numbered 2-7 kills a penny.
b. Eights, 9, 10’s, and Jacks kill nickels
c. Queens and Kings kill dimes

d. Aces kill quarters.
e. If there are no coins in the correct denomination to be killed (for
example, you get a jack but all the nickels are already dead,) the
card can kill a penny instead.
5. “Dead” bacteria can be taken off the table.
6. The person in this simulation decides to ignore their doctors advice to
take all 52 doses, and stop when they feel better. So, when you have
35 coins left on the table, stop.
7. The bacteria reproduce, and their offspring are just like them. So, for

every penny still on the table, add another penny. Add another nickel
for every nickel, etc. Count how many of each type of coin you have
(there will be 70 total), and add it to the data table. Then, figure our
the percent of each coin type by dividing the number present by 70.
Add this to your data table.

Sample Data Table:

Coin Type Number to Percent at Number Percent After
Start Start after Reproduction
Reproduction
Penny 30
Nickel 12
Dime 6
Quarter 4

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