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

What evidence did mendel find that supported his law of independent assortment? a. dominant traits are expressed when there is a dominant allele. b. traits do not affect the inheritance of other traits. c. some traits have three or four different alleles. d. plants and animals can both reproduce sexually.

What the theory that the sun goes around earth was replaced with the theory that earth goes around the sun this was an exaple of a

What are the doorways into and out of cells, attached to the membrane, and built in the rough er.