Different pitched (high- or low-toned) sounds are discriminated by the
A) tympanic membrane.
B) round and oval windows.
C) malleus, incus, and stapes.
D) hair cells in specific regions of the cochlea.
E) auditory nerve.
D
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Because ammonia is very toxic, it is kept at low levels in the body by (select all correct choices):
A. being eliminated. B. being converted to urea. C. being stored away from body tissues. D. being converted to uric acid. E. being converted to amino acids.
Describe the process of ‘reading’ a microarray in order to compare the expression of genes in two different tissues--
one that is normal and one that represents a disease such as cancer. What will be an ideal response?
Which of the following describes the Herpes virus life cycle?
a) lytic b) Galilenic c) polylinic d) eugenic e) lysogenic
Some cyanobacteria are capable of nitrogen fixation, a process that __________.
a. converts N2 to ammonia, making nitrogen available for incorporation into proteins and nucleic acids b. oxidizes nitrogen-containing compounds to produce ATP c. allows these bacteria to live in anaerobic environments d. removes soil nitrogen and returns N2 gas to the atmosphere e. s an essential part of the nitrogen cycle that extracts nitrogen trapped in mineral deposits and makes it available to organisms for their nitrogen metabolism