When two atoms share a pair of electrons, this type of chemical bond is
A. ionic.
B. covalent.
C. hydrogen.
D. negative-positive.
B. covalent.
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Microorganisms are best defined as organisms that
A. cause human disease. B. can only be found growing in laboratories. C. are infectious particles. D. are too small to be seen with the unaided eye. E. lack a cell nucleus.
Chemicals that dissolve away a plants cuticle typically result in the death of the plant as it loses its ability to photosynthesize resist herbivore grazing, retain water, repair wounds
What will be an ideal response?
Which of the following is a typical means of halting normal cell division?
A) the shortening of telomeres B) increasing the activity of p53 C) activating oncogenes D) triggering apoptosis
Which of the following microbial control methods result in the most rapid decrease in microbial numbers.
A) Antisepsis B) Sanitation C) Disinfection D) Sterilization