Which of the following is/are a sign or symptom of meningitis?
A. Fever
B. Stiff neck
C. White blood cells in cerebrospinal fluid
D. Headache
E. All of the choices are correct.
Answer: E
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Scientific discoveries have had great impact in human history. The people who make these discoveries and the circumstances that surround these discoveries are very important to our understanding of science. Can you identify the individuals as they might have described themselves?
a. I am a seventeenth century shopkeeper from Holland. My hobby involves hand-polishing glass to make lenses, some of which can magnify almost 300-fold. I was the first to observe living cells and am known as the "Father of Microbiology." b. I was the Curator of Instruments for the Royal Society of London in 1665. I developed a crude microscope that could magnify around 30-fold. I examined plant material and observed many small chambers that I called cellulae. c. At the University of California, Berkeley, I worked with radioisotopes. In the late 1940s and early 1950s, I used carbon-14 to identify the most common pathway for photosynthetic carbon metabolism. d. We worked out the double helix model of DNA structure in 1953. We later received the Nobel Prize for this work. e. I am a nineteenth century German chemist. By synthesizing an organic molecule from inorganic components, I dispelled the idea that biological processes were exempt from the laws of chemistry. f. My colleague and I worked with bacterial viruses. We were able to demonstrate that DNA–not protein–was the genetic material of the cell. g. I am a Swedish scientist. I developed the ultracentrifuge to determine sedimentation rates of proteins. The ultracentrifuge was later used to isolate subcellular fractions.
A/an ________ is the protein shell around the nucleic acid core of a virus.
A. spike B. monolayer C. capsid D. envelope E. capsomere
The major point of controversy in deCODE's plan to establish a genetic database of the people of
Iceland is A. the large expense and minimal projected benefits. B. the privacy and appropriate use of the information obtained. C. the inadequacy of the database size. D. the genetic isolation of Icelanders. E. all of these.
Genetic counseling is the best advice that a physician can give a person about his or her risk of having a child with a genetic disorder while lacking precise statistical evidence
Indicate whether the statement is true or false