In the alveoli
A. oxygen diffuses into the blood while carbon dioxide diffuses out of the blood.
B. oxygen diffuses out of the blood while carbon dioxide diffuses into the blood.
C. both oxygen and carbon dioxide diffuse out of the blood.
D. both oxygen and carbon dioxide diffuse into the blood.
E. no exchange with the blood occurs.
A. oxygen diffuses into the blood while carbon dioxide diffuses out of the blood.
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What will be an ideal response?
The enzyme adenosine deaminase acting on RNA (ADAR) catalyzes which of the following nucleotide conversions?
A. adenosine to inosine B. adenosine to cytidine C. adenosine to guanosine D. thymidine to uridine
As part of your research project, you travel to an island to learn more about the habitats and relationships of spiders, centipedes, and insects. You and your assistant plot out five different areas of the island and count the numbers of spiders, centipedes, and insects living in each plot. Your results show the following: Plot Insects Spiders Centipedes1300254242617103147152147397805791393The most plausible explanation for the high number of spiders in plot 4 is:
A. The flies and spiders worked together to eliminate the centipedes. B. There are no centipedes to prey on the spiders and there are abundant flies upon which to feed. C. There are too many flies overall. D. The spiders preyed on the centipedes and ignored the flies.
A pathogen is limited to only the host cells that contain a specific _____ molecule for binding to its surface molecules
Fill in the blank(s) with the appropriate word(s)