Which gland is associated with seasonal biorhythms?
a. pineal
b. parathyroid
c. thymus
d. pituitary
e. thymus
ANSWER: a
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Bacteriophage have a ________ complex structure than animal viruses, because ________
A) more / bacteriophages must be coated by lipopolysaccharide to attach to bacterial cells B) less / the bacteriophage does not have to penetrate the nucleus C) more / the bacteriophage must penetrate the peptidoglycan cell wall D) less / there prokaryotic cells have a simple structure compared to eukaryotic cells
The most effective level of defense against pathogens is the ____ immune system, because it ____
a. innate; recognizes specific pathogens b. adaptive; recognizes specific pathogens c. nonspecific; targets all pathogens d. inflammatory response; is mediated by T cells e. skin; provides a physical barrier against pathogens
What is the most common bacterial cause ofconjunctivitis?
a) Neisseria gonorrhoeae b) Chlamydia trachomatis c) Haemophilus influenzae d) Streptococcus pyogenes
Which of the following bacterial cell structures plays an important role in the creation of biofilms?
A. glycocalyces B. flagella C. fimbriae D. pili E. both fimbriae and glycocalyces