A good general rule is to store foods at temperatures below 4°C or above what temperature?
A) 30°C
B) 40°C
C) 50°C
D) 60°C
E) 100°C
Ans: D) 60°C
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The attraction between Na+ cations and Cl? anions forms ____ that hold together the compound NaCl
a. polar covalent bonds b. van der Waals forces c. ionic bonds d. hydrogen bonds e. nonpolar covalent bonds
A useful hypothesis typically accomplishes these two things:
A. it is falsifiable and clear B. it clearly establishes a null hypothesis and it generates a testable prediction C. it can be easily disproved and will be considered a theory if not disproved D. it frames an experiment that can shed light on the observation and guides design of the experiment
Darwin’s finches are found on the __________
Islands. a. Galápagos b. Canary c. Philippine d. Hawaiian e. Aleutian
Lipids are the only class of macromolecules that contain:
A. monosaccharides. B. phosphate groups. C. fatty acids. D. amino acids. E. nucleotides.