Explain how herbicide-tolerant weeds (“superweeds”) could appear in areas nearby transgenic herbicide-tolerant

crops. What issues arise with this scenario? What will be an ideal response?


Transgenic herbicide-tolerant crops may cross with weeds, resulting in the transfer of the
herbicide-tolerant trait to the wild weed (gene flow). Weeds that can tolerate herbicide will
not be affected by herbicide spraying; therefore, the herbicide will no longer be effective

Biology & Microbiology

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What key words does the question contain and what do they mean?

What will be an ideal response?

Biology & Microbiology

Graduate students studying population genetics are assigned the task of determining the allele frequencies of gene Z in a population. After their study is completed, the graduate students report that the frequency of allele ZA is 67%, and the frequency of allele ZB is 23%. What conclusion can you draw from these results?

a. The studied population is in Hardy-Weinberg equilibrium. b. The sample size in this study was too small to produce accurate results. c. At least one more allele of gene Z exists in the studied population. d. The studied population is evolving toward a fully homozygous genotype.

Biology & Microbiology

Which of the following supports a detrital food web?

a. dead or decaying organisms b. photosynthetic organisms c. living autotrophs d. phytoplankton

Biology & Microbiology

An australopith is a(n) _____

a. craniate d. amniote b. vertebrate e. placental mammal c. hominoid f. all of these

Biology & Microbiology