The figure below shows the spread of amphibian decline in eastern Australia
How can you use the equation for the trendline displayed in the figure to obtain an estimate of the annual rate with which amphibian decline spread northward in eastern Australia? What is the estimate provided by the trendline? (Use the scale of the figure axes to derive correct units for the rate of spread)
What will be an ideal response?
ANS:
The equation for the trendline is Y = 99X – 4.5. 99 is the slope of the equation and does represent the rate of spread. Spread is estimated as 99 km/year.
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The most critical difference between global nucleotide excision repair (NER) and transcription-coupled repair (TCR) is:
A. the initiation step; in NER the XPC protein recognizes the damage but in TCR it is the RNA polymerase that recognizes the damage. B. the excision step; NER uses UvrC (exinuclease) to nick the DNA but TCR uses the AP endonuclease. C. the removal step; NER uses UvrD (helicase) to unwind and release the damaged strand but in TCR the damaged strand is degraded by Pol I. D. the final step; NER uses Pol I and ligase to fill the gap but TCR uses Pol III and ligase. E. None of the choices given is correct.
In mice the allele for colored fur (C) is dominant to the allele for albinism (c). The allele for normal behavior (W) is dominant to that for waltzing movement (w). Give the probable genotypes of the parents if they produced the offspring
listed after the following crosses: (a) colored normal ´ white waltzer produced 10 colored normal, 8 colored waltzers, 2 white waltzers, 11 white normal (b) colored normal ´ white normal produced 35 colored normal, 13 colored waltzers (c) colored normal ´ colored normal produced 37 colored normal, 14 colored waltzers, 9 white normal, and 5 white waltzers What will be an ideal response?
Four of the five answers listed below are characteristic of meiosis. Select the exception
a. involves two divisions b. reduces the number of chromosomes c. results in producing genetically identical cells d. produces haploid cells e. occurs in the gonads
The Human Genome Project was responsible for discovery of a new class of mutation, the
____________________. Fill in the blank(s) with the appropriate word(s).