When you hold your breath, which of the following blood gas changes leads initially to the urge to breathe again?
A) rising carbon monoxide level
B) rising carbon dioxide level
C) falling carbon monoxide level
D) rising carbon dioxide level and falling carbon monoxide level
B
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Inflammatory mediators attract phagocytes such as _____________ to the site of inflammation.
What will be an ideal response?
Which habitat would be expected to have the greatest species richness?
a. an island b. a polar habitat c. an ecotone d. an agricultural habitat e. a mountain top
Within a specific bacterial strain, all the capsules will appear uniform, exhibiting the same size and shape from cell to cell.
A) True B) False
Which of the following would support the statement that bacteria represent the most fundamentally diverse group on Earth?
A) Bacteria exist in varieties with and without cell walls. B) Bacteria come in several different shapes. C) Bacteria accomplish all characteristics of life as small, single cells. D) Bacteria are metabolically diverse regarding oxygen and food requirements.