Which statement describes a virulent phage?
a. A virulent phage infects viruses.
b. A virulent phage infects prions.
c. A virulent phage infects virions.
d. A virulent phage destroys bacteria.
e. A virulent phage infects but does not destroy bacteria.
d
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Provisioning services ____
a. are critical functions that preserve and recycle resources upon which ecosystems depend b. transfer CO2 to a nutrient compartment in the biosphere c. enable populations to function within their food webs d. describe the availability of plants, animals, and other materials useful to all organisms e. involves planting crops for use by many organisms
Human damage to Earth’s ecosystem and biodiversity will likely decrease the planet’s human:
a. age structure. b. agricultural advancements. c. potential for technological innovation. d. carrying capacity.
Gene therapy:
A) involves introducing non-defective genes into the cells of an individual with a genetic disorder. B) relies on drug treatment of patients with genetic disorders at specific times that correspond with cell division. C) involves no controversial or ethical questions. D) is defined as the replacement of organs from patients with genetic disorders by transplant. E) has been wildly successful in curing human diseases.
Which of these statements are false? (Choose all that apply)
> Always use a test tube rack when transporting test tubes. > It is ok to pick up or handle a test tube by the cap. > Sterilize loops and needles in the incinerator before and after touching bacterial cultures. > It is not necessary to wash your hands before you begin working with bacteria in the laboratory, as long as you wash them before you leave the lab when you are finished. > It is ok to use personal pens and pencils in the laboratory. > Always set test tubes or petri plate lids down on the lab bench when removed. > Do not put hot loops into a culture-broth or agar.