Which cells are important elements that comprise cell-mediated immunity?
A) B cells
B) cytotoxic T cells
C) plasma cells
D) complement proteins
B
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In the ABC model of floral determination, a different combination of the three genes specifies each floral organ. Which gene works in combination with the other two?
A. A B. B C. C D. florigen E. ethylene
To process information, postsynaptic neurons often add up simultaneous signals from several presynaptic neurons. Which structure and process allow them to do so? A. axons; temporal summation
A. axons; temporal summation B. axons; spatial summation C. dendrites; temporal summation D. dendrites; spatial summation
What is the urban heat island effect?
A. Sundrenched tropical temperatures are more common in southern and western U.S. cities B. The built environment in cities absorbs heat and results in a 5 to 10 degree F temperature increase. C. Open dumping in developing countries can encourage the spread of disease D. People tend to migrate to cities located in warmer climates E. Some people are migrating to cities because they've lost their farmland due to global warming
Each protein complex in the electron transport chain receives electrons and pumps H+ into the
What will be an ideal response?