The pathway leading to the perception of sound by mammals begins with the _____
A) hair cells of the organ of Corti, which rests on the basilar membrane, coming in contact with the tectorial membrane
B) hair cells of the organ of Corti, which rests on the tympanic membrane, coming in contact with the tectorial membrane
C) hair cells of the organ of Corti, which rests on the tectorial membrane, coming in contact with the basilar membrane
D) hair cells of the organ of Corti coming in contact with the tectorial membrane as a result of fluid waves in the cochlea causing vibrations in the round window
E) hair cells on the tympanic membrane that stimulate the tectorial membrane neurons, leading to the auditory section of the brain
Answer: A
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Most cycads are pollinated by insects
A. true B. false
The Cnidarians possess:
a. a water vascular system. b. bi-lateral symmetry. c. stinging cells. d. spicules. e. setae.
Which phase of mitosis involves the shortening of the microtubules as the chromosomes move toward the poles?
A) Anaphase B) Prophase C) Metaphase D) Telophase
When running an experiment, suppose we assume the participants in the experiment are a random sample of the population. Let Yi be the outcome for individual i and let Di equal one if individual i receives the treatment and zero otherwise. What does the assumption of a random treatment imply?
A. Selection Bias = 0
B. 
- 
= 0
C. 
- 
approximates E(Yi)
D. 
approximates E(Yi|Di = 1) - E(Yi|Di = 0)