Biology - HOT Science Lab

Student
Procedures:
1. Holding your ―beak‖ in your hand, gather food and return to your nest to deposit it. Go to
the food source to get more food as many times as possible until time is up.
2. When your teacher tells you the round is over, follow the table below to determine if you
collected enough food to survive to the next round and reproduce.
Food Pieces Collected
Outcome
Fewer than 6
Does not survive
6 – 11 Survive but does not reproduce
12 – 17 Survives and produces 1 offspring
18 – 23 Survives and produces 2 offspring
24 – 29 Survives and produces 3 offspring
3. In Data Table 1, record the initial population size for each beak variation in Round 1 as
well as the total population size. (You will need to collect data from your classmates to
record these numbers.)
4. Next, use the following formula to calculate the frequency of each variation as a
percentage. Enter your results in Data Table 1. Total population size.
5. After rounds 2 and 3 are complete, fill in the rest of Data Table 1
6. Fill in Data Table 2 to calculate the change in frequency of each beak variation over
rounds 1-3.
7. Now suppose that your island is experiencing a drought. The type of food available for
the island‘s birds to eat has changed. Perform rounds 4-6 in the same way you
performed rounds 1-3. Record the results in Data Table 3.
8. Fill in Data Table 4 to calculate the change in frequency of each beak variation over
rounds 4-6.
Observations/Data:
Data Table 1
Beak
variation
Spoon
Fork
Knife
Total
Pop.
Size
Round 1 Round 2 Round 3
%
Frequency
Pop.
Size
%
Frequency
Pop.
Size
%
Frequency
Biology HSL Page 78
Curriculum and Instruction