The Lancefield grouping system
A. depends on serological detection of polysaccharide and teichoic acid antigens and is used to identify ?-hemolytic streptococci.
B. is used to identify ?-hemolytic streptococci.
C. is based on a DNA fingerprinting assay specific for streptococci.
D. depends on serological detection of polysaccharide and teichoic acid antigens.
Answer: A
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Complex multicellularity in plants and animals evolved independently. Which of the following features would you expect to be different between plants and animals because of their independent evolution of complex multicellularity?
A. The mechanism by which plants and animals obtain energy would be expected to be different because of the different origin of multicellularity. B. Cell-cell adhesion molecules would be different in animals and plants. C. Plants would have cell walls, but animal cells would not. D. A significant difference in size between the two groups of multicellular organisms would be expected.
The ability of some bacteria to produce lactate is exploited by humans to make:a
cheese and ethyl alcohol. b. insulin and antibodies. c. yogurt and sauerkraut. d. ethyl alcohol and carbonic acid. e. carbon dioxide and water
Bile is stored in the _________ and is released into the __________, where it helps to _______.
A) liver, gallbladder, break down fats B) duodenum, gallbladder, digest food C) gallbladder, duodenum, emulsify fats D) liver, gallbladder, metabolize proteins
Which of the following is an example of a lipid?
A) cholesterol B) chitin C) keratin D) cellulose