The virus known as H1N1 (swine flu):
a. has a high death rate
b. is seldom transmitted person-to-person
c. has no reliable treatment
d. has been harnessed by a vaccine
e. occasionally infects people who have direct contact with birds
d
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The natural loss of dead cells from the surface of your skin is a result of:
A. loss of adherens junctions between epithelial cells. B. breakdown of desomsomes. C. loss of microvilli. D. Answers a and b are both correct.
For the following questions, choose the letter from the list below that best matches the description (please note the answer should be a single uppercase letter):A. desertB. savannaC. taigaD. temperate grasslandE. tropical rain forestRestricted by water availability; 20 degrees to 30 degrees latitude; hot sunny days, cold nights; annuals; shrubs with long roots; succulents.
Fill in the blank(s) with the appropriate word(s).
The classification of prokaryotes in Bergey's Manual of Systematic Bacteriology is largely based on
A. Gram stain reaction. B. habitat. C. type of electron receptor used in cellular respiration. D. rRNA sequences. E. cellular morphology.
When enzyme action stops due to a buildup of end product, this control is called
A. enzyme repression. B. enzyme induction. C. feedback inhibition. D. competitive inhibition.