The oldest "manufactured" tools have been found in:

a. North America
b. Eurasia
c. Africa
d. Australia
e. South America


c

Biology & Microbiology

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The two tenets of natural selection are (select all that apply):

A. sexual reproduction in a population. B. variation in a population. C. competition in a population. D. increasing number of members in a population.

Biology & Microbiology

Which of the following Ralstonia spp. most often causes infections in cystic fibrosis patients?

a. Ralstonia gilardii b. Ralstonia insidiosa c. R. mannitolilytica d. R. pickettii

Biology & Microbiology

Haploid genomes contain two sets of chromosomes

Indicate whether the statement is true or false

Biology & Microbiology

Which of the following is not a reason why Clostridium difficile is an increasing concern in healthcare settings?

A) antibiotic misuse and overuse in the population B) antibiotic resistance C) emerging superstrains that make a third type of toxin D) the bacterium can naturally escape drugs and disinfectants by retreating into a resistant spore state E) additional modes of transmission have occurred in several isolated cases

Biology & Microbiology