Which describes why radioisotopes can be used as tracers in studying the biological and chemical processes of plants? O The radioisotope is chemically identical to the nonradioisotope the plant normally uses. The radioisotope is absorbed more quickly than the nonradioisotope the plant normally uses. O The radioisotope converts the nonradioisotope normally used by a plant into a radioisotope, The radioisotope travels through the plant without participating in any chemical processes.​