Which respiratory disease is caused by a bacterial infection?

A. the common cold
B. asthma
C. lung cancer
D. tuberculosis
E. cystic fibrosis


D. tuberculosis

Biology & Microbiology

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The heritability of a trait is the ____

a. sum of all phenotypic variation in a population b. average amount of genetic variation in each individual c. proportion of phenotypic variation that is caused by different genotypes d. absolute measurement of genotypic variation in a population e. proportion of phenotypic variation that is caused by the environment

Biology & Microbiology

Bacteria described as being coryneform have which of the following morphologic features?

a. Squared rods with squared ends arranged in pairs b. Short gram-positive cocci in branching chains c. Resemble and are often referred to as Chinese letters d. Long branching gram-positive bacilli

Biology & Microbiology

Resolution improves when the wavelength of the illuminating light decreases.

Answer the following statement true (T) or false (F)

Biology & Microbiology

Selective toxicity

A) harms the microbes without significantly harming the host. B) causes host damage without causing significant damage to the microbe. C) is the maximum tolerable dose of a drug per kilogram of body weight. D) is the same as the spectrum of activity for any given drug.

Biology & Microbiology