Carbon dioxide is produced as cells break down nutrients for energy. Which of the following pairs of systems would participate in removing the carbon dioxide from the body? A. reproductive and excretory
B. endocrine and circulatory
C. respiratory and endocrine
D. circulatory and respiratory

The process by which natural forces move weathered rock and soil brim one place to another is called

An enzymatic hydrolysis of fructose-1-p, fructose-1-p(aq) + h2o(l) - fructose (aq) + pi (aq) was allowed to proceed to equilibrium at 25°c. the original concentration of fructose-1-p was 0.2 m, but when the system had reached equilibrium, the concentration of fructose-1-p was only 6.52 x 10^-5 m. calculate the equilibrium constant for this reaction and the free energy of hydrolysis of fructose-1-p.

Are humans interfering with or a part of evolution happening today? find examples of evolution seen in recent history that could be caused by human activity.