Approximately what percentage of invading bacteria and foreign bodies are filtered out in the lymph nodes?
A) 50%
B) 90%
C) 95%
D) 99%
D
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The population of the United States is growing because the replacement fertility rate exceeds the total fertility rate.
Answer the following statement true (T) or false (F)
Which of the following is NOT normally considered a biomass fuel?
A. Waste wood chips B. Wood C. Branches D. Bark E. All of these are biomass fuels.
The presence of a reef indicates which kind of past environment?
a. cool, shallow sea b. warm, shallow sea c. cool, deep sea d. warm, deep sea e. cool, lagoon
Suppose an extra-solar planet is discovered orbiting a nearby star. The planet is spherical, composed primarily of carbon dioxide (a gas), 10 times larger than Earth, and orbits its star at a distance comparable to 5 AU. What type of planet has been discovered?
A. dwarf B. terrestrial C. Jovian