Which of the following is NOT true regarding the acid-fast stain?
A) It is used to identify members of the genus Mycobacterium.
B) Acid-fast cells retain the primary dye after treatment with acid-alcohol.
C) If cells are acid-fast, they are gram-negative.
D) Acid-fast cells appear red in a completed acid-fast stain.
E) Non-acid-fast microbes appear blue in a completed acid-fast stain.
C
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The biome with the greatest range of daily temperature extremes is the:
a. tundra b. taiga c. tropical rain forest d. desert e. grassland
Which scientist is given credit for proposing the endosymbiont theory?
A. Svante Arrenhius B. Charles Darwin C. Stanley Miller D. Louis Pasteur E. Lynn Margulis
Sixty percent of all eutherian mammals come from only two groups. Which of the following are the two groups that make up the majority of the eutherians?
a. Scandentia and Lagomorpha b. Lagomorpha and Primata c. Rodentia and Chiroptera d. Cetartiodactyla and Carnivora
If blood is too acidic, bicarbonate ions enter the bloodstream via the
a. collecting ducts. b. proximal tubules. c. distal tubules. d. peritubular capillaries. e. Henle's loop.