3. Which of the following provides evidence for the endosymbiotic theory? A. The amino acid structure of eukaryotic organelles is identical to bacteria.
B. Eukaryotic cells reproduce in the same manner as aerobic prokaryotes.
C. Both mitochondria and chloroplasts contain DNA that is different from the nucleus.
D. Both mitochondria and chloroplasts are composed of the same types of protein as aerobic bacteria

just finished the test, the answer is d, greg is the least cost-effective because he charges the most for the project

burning fossil fouls really decrease the carbon in the atmosphere so b

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.