A new influenza strain appears and is spreading rapidly. What measures might be taken by public health agencies to stop the spread?
A. Facilitate access to vaccines.
B. Identify and treat people who are infected.
C. Educate members of the public about ways to protect themselves.
D. Educate the public, promote vaccination, and treat those who are infected.
E. Shut down public transportation.
Answer: D
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Answer the following statements true (T) or false (F)
1. Studies by Avery, MacLeod, and McCarty with different strains of bacteria and those by Hershey and Chase with T2 bacteriophage determined that proteins are highly complex molecules that form the genetic material for bacteria and viruses. 2. A strand of DNA is composed of nucleotide bases, sulfate groups, and sugars. 3. When considering the complexity of genetic material, multiple genes are found within a chromosome. 4. If there is 28% adenine, then there must be 28% cytosine for the DNA composition of a particular organism. 5. DNA is a double helix structure whose strands are held together by hydrogen bonds with A to T and C to G base pairing.
Industrial smog in cold, wet winters is what color?
a. red b. brown c. yellow d. black e. gray
During periods of stress or increased activity, the parasympathetic division of the autonomic nervous system predominates; during periods of rest, the sympathetic division of the autonomic nervous system predominates
Indicate whether the statement is true or false
Organisms that gain energy by consuming preexisting organic molecules are called
A. heterotrophs. B. autotrophs. C. animorphs. D. plants. E. None of the answers are correct.