Even though they were developed over 100 years ago, Koch's postulates can be used to study all infectious diseases of humans.

a. true
b. false


Answer: b. false

Biology & Microbiology

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Substances that cannot be broken down into simpler substances are called ____________.

A. neutrons B. elements C. compounds D. protons

Biology & Microbiology

The cells of which individual do not have 23 pairs of homologous chromosomes?

a. a male b. a female c. an individual with a recessive disease, such as hemophilia d. an individual with measles e. an individual with polio

Biology & Microbiology

Which of these is not a type of noncoding human DNA?

A. repeated sequences B. multigene families C. structural DNA D. highly condensed DNA close to centromeres and telomeres

Biology & Microbiology

In a healthy human, the typical life span of a red blood cell is

A) 24 hours. B) one week. C) one month. D) four months. E) 80 years or more.

Biology & Microbiology