Which of the following is true about biofilms
a. quorum sensing is requiring for its production
b. the oxygen level varies throughout
c. a biofilm can contain endospores and vegetative cells
d. A and c
e. all of the above
Answer: e. all of the above
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Prevention and control of rabies includes
A. post-exposure vaccination of humans. B. pre-exposure vaccination of dogs and cats. C. pre-exposure vaccination of humans at high risk. D. All of the choices are correct.
Chloroplast-containing parenchyma tissue is called ____
a. sclerenchyma b. collenchyma c. meristem d. mesophyll e. periderm
HIV is a
A. double-stranded DNA virus. B. single-stranded RNA virus. C. single-stranded DNA virus. D. double-stranded RNA virus. E. prion.
A person's blood pressure has fallen below normal as the person has quickly jumped out of his or her chair where he or she had been relaxing. All of the following reflect events in restoring the blood pressure to normal EXCEPT which one?
A) The heart rate will decrease. B) The baroreceptors will detect the drop in blood pressure. C) The medulla oblongata will send signals to the heart and to the blood vessels. D) The force of contraction of the heart will increase. E) Vasoconstriction of a number of arterioles will increase blood pressure.