Biology, 18.02.2020 18:08 rlumanlan549
Radioactive isotopes Radioactive isotopes are never incorporated into organic compounds. do not occur naturally. are frequently added to foods as nutritional supplements. can be used in conjunction with PET scans to diagnose diseases.
Answers: 1
Biology, 21.06.2019 20:00, lakesha04begaye
The observations of hooke and van leeuwenhoek documenting the existence of microscopic cells formed the basis of what important theory? a. the cell theory stating that all living things are composed of cellsb. the theory of spontaneous generation, which held that life forms could arise spontaneouslyc. the theory of chemotherapy, or use of antimicrobials to destroy pathogenic organismsd. the germ theory of disease and causative agents
Answers: 1
Biology, 22.06.2019 09:00, werewolf4751
Which of these is an example of land degradation? a. containers designed to store pollutants leak. b. fertilizers provide too many nutrients to crops. c. garbage is buried so the land can be reclaimed later. d. a drought kills all the plants in an area, leaving bare land
Answers: 3
Radioactive isotopes Radioactive isotopes are never incorporated into organic compounds. do not occu...