What conditions are avoidable and unavoidable in plant experiments?

The conditions that are considered to be avoidable and unavoidable in plant experiments are the following;

Avoidable – bias, plotting or graphing errors, calculating, enough sample for representation, having no control group

Unavoidable – species variations or kind of specie used, nature or environment, genetics

regulation of gene expression. gene expression can be regulated by various cellular processes with the aim to control the amount and nature of the expressed genes. these regulatory proteins bind to dna and send signals that indirectly control the rate of gene expression

explanation:

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.