Why is it difficult to develop drugs that specifically target viruses and eukaryotic pathogens?
A) Viruses and eukaryotes evolve too rapidly for drugs to be effective.
B) The ethical concerns with testing these drugs are too great.
C) The drugs often inflict collateral damage on our own cells.
D) Security enzymes break down these foreign drugs before they can exert their effects.
E) There are often duplicate metabolic pathways that pick up the slack from any disturbance caused by these drugs.
Answer: C
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To quantify the environmental contribution of a behavioral trait, scientists turn to ____
a. whole genome sequencing b. heritability c. genome wide association studies d. analysis of innate behaviors e. SNP and haplotype analyses
Which of the following statements regarding red tides is incorrect?
A. Red tides are also known as harmful algal blooms (HABs). B. Red tides result from an overgrowth of dinoflagellates. C. Toxins produced by dinoflagellates are skin irritants. D. Dinoflagellates produce a toxin that causes paralytic shellfish poisoning.
What are the possible phenotypes of the children if the mother's genotype is IAi for blood type and the father is IBi?
(Use the Punnett square to verify your answer.) a. all AB b. A, B c. A, AB d. A, B, O e. A, B, AB, O
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 fluctuate rapidly and randomly because of genetic drift.