Reduced O2 (5% to 10%) and increased CO2 (8% to 10%) produce an environmental condition that best suits which type of organism?
a. Aerobes
b. Anaerobes
c. Capnophiles
d. Microaerophiles
D
Various types of microorganisms require different atmospheric conditions. Microaerophiles grow best in the presence of reduced O2 and increased CO2.
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The MOST common route of transmission of Salmonella typhi worldwide is through
A) contaminated food. B) contaminated water. C) direct contact. D) insect vectors.
Which of the following is a characteristic of temperate forests?
a. deciduous trees b. evergreen conifers c. infrequent precipitation d. diversity of tree species
Which animal has countercurrent heat exchange to retain heat in a cold environment?
A. birds B. whales C. foxes D. bony fish E. bees
There are more species of _____________ than there are species of plants.
a. beetles b. mammals c. crustaceans d. flies e. bees