The evolution of photosynthesis involved __________
A. convergent evolution
B. endosymbiosis
C. horizontal gene transfer
D. convergent evolution and endosymbiosis
E. horizontal gene transfer and
endosymbiosis
E
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Self-incompatibility in flowering plants is a biochemical recognition and rejection process that prevents ____
a. both self-fertilization and self-pollination b. self-pollination and occasionally prevents self-fertilization c. self-fertilization but not self-pollination d. self-pollination but not self-fertilization e. self-fertilization and occasionally prevents self-pollination
In all but the simplest animals, osmoregulation and excretion is carried out using tubules that are ____
a. specialized blood vessels b. part of the lining of the digestive tract c. modifications of the respiratory and digestive systems d. associated with the surface of the skin e. formed from transport epithelium
Which type of virus causes polio and AIDS?
A) retrovirus B) reovirus C) bacteriophage D) adenovirus E) parvovirus
A steady state, or equilibrium potential, in a neuron is reached when:a
the outflow of sodium equals the inflow of potassium. b. the inflow of sodium equals the inflow of potassium. c. the outflow of potassium equals the inflow of potassium. d. the outflow of sodium equals the inflow of sodium. e. the outflow of calcium equals the inflow of sodium