Unformatted text preview: rtship and Other-predators
hypothesis: Supported U) U)
U) Spiders avoided flies
with wing markings
and wing waving 0
20 I a) 0.
rk Housefly w/Zono
Untreated housefly 10
C (I) 0 FIGURE 1.11 Experimental Evidence That Waving Marked Wings Deters Jumping Spiders
Researchers used Zonosemata flies and houseflies to create five treatment groups. Each group tested a dif
ferent proposition about wing-waving display. Experimental results are presented as a type of graph, called a
histogram. In this case, the histograms show how jumping spiders responded to the 20 flies in each treatment
group. QUESTION The biologists who did this work claim that these data support the hypothesis that both
wing markings and wing waving are essential to successful mimicry. Do you agree? Why or why not? What would you measure? What Is A Scientific Theory?
A theory = a proposed explanation for a very broad
class of phenomena or observations
How does the terms theory differ from its use in everyday
The word "the...
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