How many humans do not have enough clean water to meet basic needs?

a. five out of every ten
b. eight out of every ten
c. three out of every four
d. one out of every ten
e. two out of every five


C

Biology & Microbiology

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A pseudomonad that loses its R plasmid in the soil is LEAST likely to

A) cause an infection in a human. B) colonize a surface. C) infect a shrub. D) survive a habitat dominated by antibiotic-producing Streptomyces spp.

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The phospholipids of plasma membranes have

a. a hydrophobic head and a hydrophilic tail. b. a hydrophobic head and a hydrophobic tail. c. a hydrophobic head and two hydrophobic tails. d. a hydrophilic head and two hydrophobic tails. e. a hydrophilic head and two hydrophilic tails.

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Mechanisms that prevent mating between species are called ________ isolating mechanisms

Fill in the blank(s) with correct word

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A microscope that exposes specimens to ultraviolet, violet, or blue light and forms an image with the light emitted at a different wavelength is called a ________ microscope.

A. fluorescence B. scanning electron C. dark-field D. phase-contrast

Biology & Microbiology