Why are rabies shots given to domestic animals yearly and not just once in the animal's lifetime?
What will be an ideal response?
Answer: After the initial rabies vaccine immunization, the antibody titer in an animal decreases over time, but subsequent yearly exposure to the same antigen causes another memory response. This annual shot is known as a "booster shot." Periodic reimmunization maintains high levels of memory B cells and circulating rabies antibodies, providing long term active protection against rabies diseases.
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Which of the following is an example of the use of the binomial system devised by Linnaeus?
A. O157:H7 B. Enterobacteriaceae C. Enterobacteriales D. Escherichia coli
What is a disease associated with extra nuclear inheritance?
A. Angelman Syndrome B. Prader-Willi Syndrome C. LHON D. Muscular Dystrophy
There are several proposed mechanisms that could have produced organic monomers. What mechanism involves the formation of organic compounds in interstellar clouds?
a. hydrothermic vents b. organic compounds arriving on earth via meteorites c. reactions involving hot water and metal ions from rocks d. lightening fueled-atmospheric reactions e. the aggregation of dust and rock bits that were orbiting the sun to form earth
Which of the following bodies of water best represents a lotic ecosystem?
A) salt pond B) marsh C) oxbow lake D) stream