How could you verify that a soft-drink container contains diet soft drink rather than soft drink sweetened with fructose?
What will be an ideal response?
Test the two liquids with a Benedict’s test. Soda sweetened with fructose with test positive (form a reddish-brown precipitate), while diet soda will give a negative test and the Benedict’s solution will remain blue in color.
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Imagine that you are studying a very large population of moths that is isolated from gene flow. A single gene controls wing color. Half of the moths have white-spotted wings (genotype WW or Ww) and half of the moths have plain brown wings (ww). There are no new mutations, individuals mate randomly, and there is no natural selection on wing color. How will p, the frequency of the dominant allele, change over time?
A) p will increase; the dominant allele will eventually take over and become most common in the population. B) p will neither increase nor decrease; it will remain more or less constant under the conditions described. C) p will decrease because of genetic drift. D) p will increase initially, then decrease until the W allele vanishes from the population. E) p will fluctuate rapidly and randomly because of genetic drift.
Which is not an example of a force between two atoms?
Which of the following genera grow symbiotically within root nodules of legumes as nitrogen-fixing bacteroids?
A. Bacteroides B. Rhizobium C. Agrobacterium D. Nitrosomonas
One mole of a substance contains 6.02 x 1023 molecules. The atomic number of Li is 3 and the atomic mass is approximately 7 . If you have three moles of Li, how many grams does it weigh?
A. 9 B. 21 C. 7 x 6.02 x 1023 D. 3 x 6.02 x 1023