What relation exists between an enzyme and a catalyst. 1-Enzymes and catalysts play no role in chemical reactions.

2-Like catalysts, enzymes speed up chemical reactions by
increasing their activation energy.

3-Enzymes are biological catalysts.

4-Like catalysts, enzymes slow down chemical reactions.

Answer and I will give you brainiliest

The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.

Guinea pig coat color is determined by a single gene. the allele for black coat color is dominant to brown. in a cross between twoblack-haired guinea pigs, 20 offspring are born. if both parents were heterozygous, probability would predict that approximately howmany of the 20 offspring would have brown hair?

Post test: evolutionselect the correct answer.in a particular mouse species, two extremes of a phenotype arethese two phenotypes begins to increase over the preexisting npopulation attenatural selecio