Question

a scientist thinks that a certain chemical is a mutagen. she exposes plant cells to a large amount of this chemical in the laboratory. which statement best provides evidence that the substance is a mutagen? the cells die within hours of being exposed to the chemical. the cells grow more quickly than those that were not exposed to the chemical. the cells change after being exposed to the chemical, and this change is passed to the next generation of cells. the cells continue to divide at the same rate as before they were exposed to the chemical.

Explanation:

A mutagen is a substance that causes changes in the DNA of an organism. If plant - cells change after being exposed to a chemical and this change is passed on to the next generation of cells, it indicates a change in the genetic material (DNA), which is characteristic of a mutagen. Cell death, faster growth, or non - heritable changes are not conclusive evidence of mutagenicity.

Answer:

The cells change after being exposed to the chemical, and this change is passed to the next generation of cells.