13. photosynthesis a. electron transport chain b. Stage 3 14. Stage 2 c. Krebs cycle 15. ATP and NADPH formed d. acetyl-CoA formation 16. acetyl-CoA formation e. radiant energy 17. Krebs cycle f. Stage 1 g. glycolysis h. cellular respiration i. Calvin cycle j. light reactions

What does the hardy-weinberg principle relate to? a. chances of survival of an organism b. frequency of alleles in a population c. natural selection in a species d. causes of evolution among organisms

How are gross production and net production different? a. net production is always greater than gross production. b. net production is always less than gross production. only animals have net production. d. only plants have net production. select the best answer from the choices provided

Which of the following is an advantage of using embryonic stem cells in medical research? a. the use of embryonic stem cells is much less expensive than the use of adult stem cells. o b. no living tissue is damaged when scientists use embryonic stem cells. o c. embryonic stem cells are able to differentiate into a wider range of cells than adult stem cells. d. there is no controversy surrounding the use of embryonic stem cells.