Algal blooms result when unusually high amounts of nutrients enter the sea from:
a. runoff from land.
b. leaching from marine sediments.
c. direct intentional dumping.
d. input from wind.
e. shipboard disposal at sea.
A
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Bacterial infections have become much more of a threat to human health due to
A. the increased use of antibiotics. B. an increase in acquired antibiotic resistance by innocuous strains. C. horizontal transfer of pathogenicity. D. both an increased use of antibiotics and an increase in acquired antibiotic resistance by innocuous strains. E. All of the events given have increased the threat of bacterial infections.
Which of the following is a difference between a purine and a pyrimidine?
a. Purines have a single ring structure. b. Pyrimidines cannot bind phosphate. c. Pyrimidines are smaller in size. d. Purines are only found in RNA.
Describe the molecular difference between ATP and ADP
What will be an ideal response?
Anna recently learned that she is pregnant and is visiting her doctor for her first prenatal visit. Among the many pieces of advice offered to ensure a safe pregnancy, the doctor specifically told Anna to avoid eating any rare meats, including steaks and roast beef, and to avoid changing her cat's litter box. These words of caution were primarily directed at avoiding contact with
A. Taenia saginata B. E. coli O157:H7 C. Cryptosporidium D. Toxoplasma gondii