In statistics, what is a sample?
A) the mean of a population to be studied
B) a small subgroup of a population to be studied
C) the correlation between the two different experimental factors
D) a range of values with a high probability of containing the true mean
B
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In the Hershey and Chase experiment, the pellet was radioactive after bacteria had been infected with
32P-labeled viruses and centrifuged. Why?
a. Bacteria were centrifuged to form the pellet, and they had incorporated radioactive proteins into their DNA. b. Bacteria were centrifuged to form the pellet, and they had incorporated radioactive DNA. c. Viruses were centrifuged to form the pellet, and they had incorporated radioactive proteins from the bacterial DNA. d. Bacteria were centrifuged to form the pellet, and they had incorporated radioactive proteins into their cell membranes. e. Viruses were centrifuged to form the pellet, and they had incorporated radioactive DNA.
Appear stratified; nuclei of cells at different levels; cells near basement membrane are cuboidal
A. Pseudostratified columnar B. Simple columnar C. Simple cuboidal D. Simple squamous E. Stratified squamous F. Transitional
Answer the following questions true (T) or false (F)
1. Some bacterial cells are resistant to a variety of antimicrobials because they actively pump the drugs out of the cell. 2. The outer membrane of Gram-negative bacteria enables many antimicrobial drugs to enter the cell more easily. 3. If a subculture of an MIC test grows in an MBC test, the concentration of the drug was bactericidal.
Which of the following diseases could be prevented with proper sewage disposal and water purification?
A) Lyme disease B) Leptospirosis C) Vibrio parahaemolyticus gastroenteritis D) Vibrio vulnificus gastroenteritis E) Cholera