Which types of mutation are most damaging to an organism? a) Substitution & Deletion
b) Deletion & Insertion
c) Insertion & Substitution

Most animal cells membranes have proteins that pump ions out of the cell and potassium ions into the cell

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.

Select the correct answer from each drop-down menu proteins are