1) which of the following best describes what causes plasma cells to form during a humoral immune response?
a) memory b cells signal phagocytes to attack infected cells and divide, producing plasma cells.
b) the antibodies on the surface of b cells bind to antigens, and the b cells grow and divide, producing plasma cells.
c) the antigens on the surface of a pathogen attack healthy cells, and the resulting inflammation signals t cells to divide, producing plasma cells.
d) memory t cells recognize antigens and signal t lymphocytes to divide, producing plasma cells
2) damage to which of the following structures would be most likely to result in an increase in mutations in a man's sperm cells?
a) epididymis
b) testes
c) urethra
d) scrotum

Which of the following conclusions can be drawn

Which best describes an adaptation that could be found in a fish that lives in a slow-flowing stream? the ability to attract prey by glowingextra gills, for oxygen extractionthe ability to grow largerextra fat, for warmth

When in solution, a molecule that moves slowly across an artificial membrane moves rapidly across a plasma membrane. this molecule rapidly enters the cell regardless of whether its concentration is higher inside or outside the cell. using this information, which transport mechanism is most likely to be responsible for the movement of the molecule across a plasma membrane? view available hint(s)when in solution, a molecule that moves slowly across an artificial membrane moves rapidly across a plasma membrane. this molecule rapidly enters the cell regardless of whether its concentration is higher inside or outside the cell. using this information, which transport mechanism is most likely to be responsible for the movement of the molecule across a plasma membrane? active transportexocytosis