A placebo is a mock drug
Indicate whether this statement is true or false.
TRUE
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All members of the phylum Chordata share
a. a notochord present sometime in their lives. b. a vertebral column. c. gills present throughout their lives. d. tails present throughout their lives. e. exoskeletons.
Effector B cells secrete antibodies that bind to
any remaining bacterial cells and
a. prevent them from attaching to any body cells. b. flag them for phagocytosis. c. bore holes in their cell walls. d. prevent them from attaching to any body cells, and flag them for phagocytosis. e. prevent them from attaching to any body cells, flag them for phagocytosis, and bore holes in their cell walls
Weakening of trade winds results in
A) flooding in Peru. B) flooding in Indonesia. C) reduced convection. D) cooler ocean temperatures in Peru.
Gene flow is a concept best used to describe an exchange between
A) species. B) males and females. C) populations. D) individuals. E) chromosomes.