Nitrogen, with an atomic number of 7, has ____ electron(s) in the first energy level and ____ electrons in the second
energy level.
a. one; six
b. two; five
c. three; four
d. four; three
e. five; two
ANSWER: b
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separate entity? a. a cell b. a molecule c. an organ d. a population e. an ecosystem
Which of the following arises from the mesoderm?
a. pituitary gland b. inner layer of skin c. chorion d. outer layer of skin e. lining of respiratory system
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.
The pleomorphic bacterium (Coxiella/Legionella/Francisella) is an intracellular parasite that can lead to respiratory disease when inhaled in aerosols from freshwater sources.
Fill in the blank(s) with the appropriate word(s).