Enzymes are able to speed up chemical reactions because they- a) increase the temp inside the cell
b) reduce the friction between the reactants
c) make the raw materials more chemically reactive
d) lower the activation energyof the reaction

answer; polycythemia is the correct answer;

the correct answer, according to e2020, is the second choice there is an occluded front in region a and a cold front in region b.

c. establishing proper sleep hygiene

we need additional information in order to determine the cause of death for anna garcia. there are at least 3 things with explanation included as to why we need them are as follows: