The incidence of tuberculosis in the year 2000 in the United States was 12.43/100,000 cases. This means
A) 12.43 of every 100,000 people in the United States had tuberculosis in the year 2000.
B) 12.43 of every 100,000 people died of tuberculosis in the United States in the year 2000.
C) there were 12.43 new cases of tuberculosis for every 100,000 people in the United States in the year 2000.
D) there were 12.43 tubercle bacilli per 100,000 microbes in the United States in the year 2000.
E) 12.43 of every 100,000 cases of tuberculosis were treated in the United States in the year 2000.
C
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What function does the presence of alkaline components in pancreatic juice serve?
a. Creates an optimum environment for digestion in the small intestine b. Neutralizes the acidity of stomach contents c. Stimulates peristalsis in the small intestine d. Creates an optimum environment for digestion in the stomach e. Stimulates peristalsis in the stomach
Darwin's ideas on evolution were based on a number of observations. Among the most important observation was that
a. all the types of organisms that have lived on Earth are present today. b. individuals within a population are all virtually identical to each other. c. there is usually ample food and water for all populations. d. when natural resources become scarce, competition occurs between members of the same species. e. populations will only produce as many offspring as can be accommodated by the environment.
The influenza virus contains an RNA genome. Why do scientists typically have to make a new vaccine for the flu every year?
Because our bodies develop resistance to the vaccine and it becomes less effective Because the virus develops resistance to the vaccine Because the virus can mutate into new strains Because people change their habits each year and become susceptible to different strains of the virus Because the common influenza virus can come from many species of animals including cats and dogs
Why is oxygen needed in cellular respiration?
A) Oxygen combines with ADP to create ATP. B) Oxygen is the final electron acceptor in the electron transport chain. C) Oxygen carries electrons from the citric acid cycle to the electron transport chain. D) Fermentation in muscle cells relies upon oxygen as an electron acceptor.