Q: Q: Which therapy uses viruses to genetically modify diseased cells and tissues? A:

OPTIONS:
- chemotherapy
- digestive therapy
- oxygen therapy
- viral therapy

A: viral therapy

Q: Q: Vertical layering is an important feature of the terrestrial type of what kind of community? A:

OPTIONS:
- habitat
- environment
- ecosystem
- biome

A: biome

Q: Q: The conductive cells within the heart establish the heart rate and transmit it through the what? A:

OPTIONS:
- meiosis
- conduction
- neurons
- myocardium

A: myocardium

Q: Q: What has atoms with unstable nuclei? A:

OPTIONS:
- hydrocarbon
- microwaves
- radionuclide
- radioisotope

A:
radioisotope