23. Only small amounts of enzymes are required for
reactions within cells because enzymes are
(1) fragile
(2) reused
(3) small molecules
(4) constantly synthesized

Chris lives in a city that experiences heavy rainfall with average annual precipitation of 882 millimeters. it is warm all year. mark lives in city with an average annual rainfall of 40 millimeters. it has hot summers and cool winters. chris's city is in a climate, while mark's city is in a climate.