What is the current status of gene therapy?
a. It is currently being used effectively to cure cystic fibrosis.
b. It has been terminated because clinical trials have shown it to be ineffective.
c. It is being evaluated to assess the risks associated with potential side effects.
d. The number of clinical trials is increasing at an almost uncontrollable rate.
e. It may be considered in the future, but currently the technology is not available.
c
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Which of the following is true of incomplete penetrance?
A. Environmental factors do not influence penetrance. B. Incomplete penetrance implies that some individuals will experience less severe forms of disease such as cancer or Alzheimer's. C. Gene interactions have been shown to result in incomplete penetrance in some cases. D. Incomplete penetrance refers to cases in which individuals developing a particular disease (e.g., cancer or Alzheimer's) lack the typical genotype for this disease.
Which biome occurs where winter drought reduces photosynthesis and most trees drop their leaves?
a. tropical montane forests b. tropical deciduous forests c. boreal forests d. dry savannas e. temperate forests
Nucleotides are monomers of
a. complex lipids. b. proteins. c. polysaccharides. d. nucleic acids. e. all of these.
The first hominin known to use sophisticated tools and fire was _______________. Fill in the blank(s) with the appropriate word(s)