During respiration, members if the animal kingdom use___and then release___ as a waste gas. A. Carbon dioxide; water vapor
B. Oxygen; carbon dioxide
C. Oxygen; hydrogen
D. Carbon dioxide; oxygen

thinking it would be d not too sure but i think it's right

answer; the tunica intima also called tunica interna, consists of elastic fibers,connective tissue and smooth muscle cells;

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

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).   so the answer is a.