An infection spread between animals and humans is a ________.
A. zoonosis
B. healthcare-associated infection
C. secondary infection
D. sequela
Answer: A
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Holding media, such as Stuart's medium and Amie's transport medium, are used to:
a. maintain the viability of microorganisms present in a specimen. b. support the growth and multiplication of any pathogenic organisms that are present. c. prevent clotting of specimens such as blood, bone marrow, and synovial fluid. d. allow pathogenic organisms to grow while nonpathogenic organisms die.
In a dihybrid cross AA bb × aa BB, what proportion of the F2 offspring is expected to be homozygous for at least one gene?
A) 1/4 B) 1/2 C) 3/4 D) All are homozygotes. E) None are homozygotes.
Which of the following exhibits a Type III survivorship curve?
a. oak tree b. sparrow c. human being d. whale
One of the functions of skin is the synthesis of vitamin D. Which of the following would be evidence for this function?
A) Vitamin D levels are higher in people who take supplements, such as multivitamins. B) Vitamin D levels are lower in people who wear sunscreen. C) Cancer rates are higher in people with more sun exposure. D) People living in the tropics are vitamin D deficient.