All of the following are polysaccharides EXCEPT _____
A) lactose
B) glycogen
C) chitin
D) cellulose
E) amylopectin
Answer: A
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Geosmins are
A. a strain of Bacillus. B. nitrogen-fixing bacteria. C. metabolites that give soil its odor. D. produced by Rhizobium. E. metabolites that give soil its odor AND produced by Rhizobium.
The pyramid of energy illustrates
a. the first law of thermodynamics. b. the diminishing of usable energy as it is transferred through an ecosystem. c. that energy can be recycled. d. the biological magnification of materials in an ecosystem. e. the diminishing number of organisms at each trophic level
Two populations that inhabit the same area but remain genetically distinct can best be called
A. sympatric species. B. allopatric species. C. subspecies (races). D. polymorphic. E. species.
The tertiary structure of a polypeptide refers to
A) its size. B) the presence of pleated sheets. C) the amino acids of which it is made. D) the overall three-dimensional structure.