Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
What will be an ideal response?
This question asked you to analyze radioactive decay data to calculate the amount of radioactive
carbon in an initial sample. If you got the correct answer, great job! If you got an incorrect answer, where
did the process break down? Did you recall that the amount of sample could be cut in half with each
decay? One common misconception is to think that 4 rounds of decay would decrease the radioactivity 4-
fold. Each round cuts the amount of radioactivity in half, so this leads to a 16-fold decrease.
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Heteroplasmy is associated with inheritance patterns involving
A. nuclear. B. paternal DNA. C. chloroplasts. D. ribosomes. E. imprinted.
Which cells connect different photoreceptor cells to each other?
a. optic ganglion cells b. amacrine cells c. bipolar cells d. rods and cones e. horizontal cells
Which of the following is not an autosomal recessive disorder?
A. sickle-cell disease B. Marfan syndrome C. cystic fibrosis D. Tay-Sachs disease E. All are autosomal recessive disorders.
Which of the following caused massive declines in U.S. commercial fish populations?
A) recreational anglers B) freak weather events in the 1980s C) huge factory trawlers D) foreign commercial fisherman