A Plant Scientist Exposes the Seeds of a Model Organism

A plant scientist exposes the seeds of a model organism such as Arabidopsis to mutagenic substances.She then treats the resulting seedlings with a specific hormone and looks for individual plants with a unique physiological response.DNA sequencing of these mutants can reveal the underpinning of signal transduction pathways.This type of study is called a(n)

A) genetic screen.
B) circadian rhythm.
C) common garden experiment.
D) aleurone layer.
E) cytochrome test.