What is cross-contamination?
a. The transfer of harmful microorganisms from one food or surface to another
b. The presence of harmful microorganisms in food
c. When someone becomes ill after having eaten food containing toxins
d. When more than two people become sick from eating the same food

What field of science did harry hess study?

Up until 1938, paleontologists accepted the idea that coelacanths (an ancient fish) went extinct at the time that they last appear in the fossil record, about 80 million years ago. but in 1938, a live coelacanth was discovered off the coast of south africa that was compared to the fossil record and found to be the same species what goal of science does this discovery represent

Which is an important function of normal flora? a. aid with bone marrow production. b. crowd out pathogenic bacteria. c. destroy digestive track pathogens. d. manufacture iron in the bloodstream.