Respiration is measured in a human. How do the concentrations of O2 and CO2 in inhaled air compare with exhaled air?
A. Inhaled air has less O2 and more CO2 than exhaled air.
B. Inhaled air has more O2 and less CO2 than exhaled air.
C. Inhaled air has more O2 and CO2 than exhaled air.
D. Inhaled air has less O2 and CO2 than exhaled air.
B. Inhaled air has more O2 and less CO2 than exhaled air.
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Where are the largest reserves of carbon on the planet?
A. soils B. frozen lakes C. rocks and fossil fuels D. fossil fuels E. the oceans
The sex life of the saguaro cactus begins
a. immediately after formation. b. after 5–10 years. c. after 35–50 years. d. after 100 years
There is NO convincing fossil evidence for
which of the following? a. evolution b. extinction c. change d. catastrophism e. uniformitarianism
Antitoxins
A. include capsule material against the pneumococcus and meningococcus. B. contain purified, chemically denatured bacterial exotoxin. C. contain antibodies to neutralize specific toxin. D. use vaccinia virus with genetic material of bacterial toxins. E. contain attenuated organisms.