Mail-order catalogs often advertise a device for repelling irritating insects. One device has a frequency range from 30,000 to 65,000 cycles per second (Hz). Humans hear from roughly 50 to 15,000 cycles per second. In designing an experiment to determine if this device actually does repel a certain insect, what question(s) should you ask?
A. Is the target insect able to perceive a sound between these frequencies?
B. Does the insect move away from this sound device at a rate higher than random chance?
C. Does the insect produce any sounds within this range that would lead to a biological function to perceiving such frequencies?
D. Does the insect approach this sound device at a rate higher than random chance?
E. All of the choices are correct.
Answer: E
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A. Orconectes luteus. B. Orconectes. C. luteus. D. O. luteus. E. Orconectes l.
The amount of observable variation due to environment can be measured by comparing the number, frequency and
kinds of alleles in both parents and offspring. _________ Indicate whether the statement is true or false.
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A. Collect more data. B. Run a probit/logit model. C. Consider alternative data populations (e.g., additional variables) before attempting to estimate the effect. D. Re-run the experiment.
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