An unapproved form of gene therapy, known as enhancement gene therapy, can create considerable ethical dilemmas. Why?
What will be an ideal response?
Enhancement gene therapy might be used by people who wish to have their children genetically "enhanced" for some desired trait such as increased height, enhanced athletic ability, or exceptional intellectual potential. Like germ-line therapy, enhancement gene therapy is viewed by most as unacceptable; however, gene product is already being used for growth-associated disorders.
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Which one of the following statements about archaeans is false?
A) Archaeans are more closely related to eucaryotes than they are to bacteria. B) Both archaeans and bacteria are procaryotic organisms. C) Some archaeans live in extremely hot environments. D) The cell walls of archaeans contain a thicker layer of peptidoglycan than the cell walls of bacteria.
What is the leading hypothesis for what might have brought about the extinction of the dinosaurs?
A. Competition from mammals B. A new disease C. Massive volcano eruptions D. An asteroid impact
Fungi exist mainly in the form of slender filaments, barely visible to the naked eye, which are called ________.
Fill in the blank(s) with the appropriate word(s).
Which of the following pairs is mismatched?
A. coliform Enterobacteriaceae; rapid lactose fermenters B. non-coliform opportunistic Enterobacteriaceae; Proteus, Morganella C. coliform Enterobacteriaceae; opportunistic pathogens D. non-pathogenic Enterobacteriaceae; Salmonella, Shigella E. non-coliform Enterobacteriaceae; non-lactose-fermenters