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E ect of Temperature on Growth Rate
0.05
0.10
0.15
0.20
Intrinsic Growth Rate (h)
0.00
22
30
26
Temperature (ºC)
Colpidium
Paramecium
André Gilden/Alamy Stock Photo
REVISIT THE PHENOMENON
Why would a bird build a nest
in a tree with thorns?
CER
Claim, Evidence, Reasoning
Explain Your Reasoning
Revisit the claim you made when you encountered the
phenomenon. Summarize the evidence you gathered from your investigations and
research and finalize your Summary Table. Does your evidence support your claim? If not,
revise your claim. Explain why your evidence supports your claim.
STEM UNIT PROJECT
Now that you’ve completed the module, revisit your STEM unit project. You will
summarize your evidence and apply it to the project.
Module Wrap-Up
C
C
C
S
E
P
D
C
I
THREE-DIMENSIONAL THINKING
GO FURTHER
Data Analysis Lab
Does temperature affect growth rates of protozoans?
Researchers studied the effect of temperature on the growth
rates of protozoans. They hypothesized that increasing
temperature would increase the growth rate of the
protozoans.
Data and Observations
The graph shows the effect of
temperature on the growth rate of
Colpidium
and
Paramecium
.
CER
Analyze and Interpret Data
1.
Identify
the dependent and independent variables.
2.
Claim, Evidence, Reasoning
Does the data support the
hypothesis? What does the data show about the
relationships between the dependent and independent
variables? How does the data support your claim?
3.
Evaluate
What might be the next step in the researchers’
investigation? Explain.
*Data obtained from: Jiang, L. and Kulczycki, A. 2004.
Competition, predation, and species responses to
environmental change.
Oikos
106: 217–224.
Module 2 • Principles of Ecology
47