Which of the following occurs during forced expiration?
a. The alveoli inflate.
b. The ribs move upward.
c. The internal intercostal muscles contract.
d. The floor of the thoracic cavity moves downward.
e. The pressure increases in the thoracic cavity.
c
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The first identified case in an outbreak is called the
A. starter case. B. traceable case. C. primary case. D. index case.
One way to study the human genome is to
A) determine the twisting patterns of the two sides of the double helix. B) determine the sequence of sugars and phosphates. C) determine the DNA sequence. D) conduct a phenotype-wide association study.
Viruses that cause infection resulting in alternating periods of activity with symptoms and inactivity without symptoms are called ________.
A. prions B. delta agents C. viroids D. oncogenic E. latent
The yolk of an animal egg has what type of analog in angiosperms?
A) endosperm B) carpels C) fruit D) seed coat