How do we perceive the pitch of sounds?
A) The hammer, anvil, and stirrup vibrate at different speeds.
B) Different parts of the basilar membrane vibrate in response to different frequencies of sound.
C) Rods vibrate in response to high-frequency sounds and cones respond to low-frequency sounds.
D) The tympanic membrane vibrates more strongly at high frequencies.
E) The pinna swivels in different directions in response to sounds of different frequency.
B
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In what ways do human X and Y chromosomes differ from one another?
A. The X chromosome is larger than the Y. B. The X chromosome has about 1,000 genes and the Y has only about 50. C. The X chromosome is found only in females, while the Y is found only in males. D. The X and Y chromosomes differ both in size and in number of genes. E. The X and Y chromosomes have no regions in common and do not pair during meiosis.
Which of the following defines epigenetic gene regulation?
a. regulation when the DNA is uncoiled and loosened at the nucleosomes to bind transcription factors b. regulation after translation c. regulation when RNA is processed and exported to the cytoplasm after it is transcribed d. regulation when RNA is translated to protein
Microbes that cause infectious diseases are called (pathogens/germs/viruses).
Fill in the blank(s) with the appropriate word(s).
What is the name of the second cervical vertebra?
What will be an ideal response?