The body obtains sugar from food. which system most directly affects blood sugar levels? respiratory muscular circulatory digestive

Mr. olajuwan was in a horrific snowmobile accident. afterwards he had trouble walking and he had a loss of balance. which of the 4 major brain region was probably demaged

Which kind of worm has a closed circulatory system? a planarian b fluke c pinworm d an earthworm

Select the correct answer from each drop-down menu. the lac operon in e.coli regulates genes that code for enzymes required for breakdown of lactose. the lac operon is operon that is activated in the presence of .