Which of the following lacks sufficient penetrating power for bulk sterilization?
A. Alpha and beta particles
B. Gamma radiation
C. Ultraviolet (UV) radiation at 260 nm
D. X rays
Answer: C
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In subarctic saltmarshes, scientists have found that the addition of calcium has no effect on productivity, but additional iron does increase productivity. In this example, iron
A. is a precursor to calcium. B. stimulates evapotranspiration. C. biomagnifies in the marsh plants. D. is a limiting factor. E. blocks the effect of calcium.
Would drinking a gallon of tap water, a gallon of sea water, or a gallon of beer produce the most
urine? Why?
What will be an ideal response?The feature of carbon important for producing a diversity of organic molecules is
A. carbon bonds are stronger than any other bond. B. carbon bonds cannot be broken in the range of temperatures associated with life. C. carbon can form both polar and nonpolar covalent bonds with various elements. D. carbon can form hydrogen bonds with water. E. carbon can form up to two covalent bonds with other elements.
Formation of glycosidic bonds between carbohydrate monomers to synthesize polysaccharides would be called...
a) anabolism b) phosphorylation c) fermentation d) exergonic e) glycolysis