An antibiotic is given repeatedly to treat a recurrent ear infection. It worked initially but now is no longer effective. This indicates that the Streptococcus bacterium
A) is very sensitive to the antibiotic.
B) is being treated with an antibiotic that has experienced a manufacturing error, making it infective.
C) is infectious only if it is sensitive to the antibiotic.
D) experienced natural selection that has allowed the resistant Streptococcus to survive and multiply.
D
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Compared to uric acid, producing urea as the main form of nitrogenous waste requires ____
a. more energy and water b. less energy and water c. more energy and less water d. the same amount of energy and water e. less energy and more water
Which of the following is an example of sequelae?
A. Arthritis from Lyme disease B. Diarrhea from Salmonella enteritidis infection C. Headache from meningitis D. Difficulty swallowing from streptococcal infection
Describe the feeding behavior of humpback whales. Why do they employ this type of food capture method?
What will be an ideal response?
Which statement is least consistent with the beliefs of Lamarck?
a. “Fluida” moves into areas of the body in need of change. b. Acquired characteristics are inherited. c. Giraffes' necks have become longer in response to stretching. d. Environmental pressures bring about changes in organisms. e. Changes in an individual are not passed to its offspring.