Unformatted text preview: Section 6: Graded Questions
06.10. Horned lizards use their horns to defend against predatory birds. A researcher
observed that lizards living in areas with predatory birds have longer horns than those
in areas with no predatory birds. This observation led her to hypothesize that longer
horns offer more protection against predation than do shorter horns. To test this
hypothesis, the researcher tagged 20 lizards with long horns and 20 lizards with short
horns in each of two locations: Desert Valley, where there are no predatory birds, and
Cactus Corner, where there are predatory birds. She returned every week for 12 weeks
to measure survival of tagged lizards. The graphs below represent her findings.
What can you conclude from the researcher's results?
Cactus Comer (.
20 9 0
O Long harris
The hypothesis that longer horns offer greater protection against predation supported.
. The hypothesis that longer horns offer greater protection against predation is NOT supported
The experiment is well designed, but the results are inconclusive about the hypothesis.
The experiment is not well designed to test the hypothesis.
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- Fall '19
- Cactus Corner, Shari horns