Which of the following is not an example of biotechnology? Select one:
a. Sourdough bread
b. Yogurt
c. Penicillin
d. Corn

Describe the primary and secondary immune response in terms of speed and number of antibodies produced?

Which of the following can be reduced by the use of renewable energy sources? a. social costs b. economic costs c. environmental costs d. all of the above select the best answer from the choices provided a b c d

What evidence supports the law of conservation of energy? a) mechanical energy is converted to chemical energy during photosynthesis. b) oxygen is made from the breakdown of carbon dioxide during photosynthesis. c)energy is absorbed by chlorophyll and becomes chemical energy during photosynthesis. d)the sun gives off light energy that is absorbed by plants.