Question

scientists use tissue cultures to study possible medicines that can be used to treat cancer patients. what is one benefit of this procedure?
patients do not receive harmful or ineffective medication.
the cultured cells are not in their normal environment.
doctors know how to treat all types of cancer.
one tissue culture can be used for all cancer patients.

Explanation:

Tissue cultures allow scientists to test medicines on cells in a controlled environment. If a medicine is harmful or ineffective on the cultured cells, it won't be given to patients. This protects patients from potential harm. The option "The cultured cells are not in their normal environment" is a fact but not a benefit. Doctors do not know how to treat all types of cancer, so that option is incorrect. One tissue culture cannot be used for all cancer patients as different cancers have different characteristics.

Answer:

Patients do not receive harmful or ineffective medication.