Organisms that have catalase What are you looking for in your observations when you are looking for evidence of a reaction?
Does the plant tissue that was tested contain catalase?
Does the animal tissue that was tested contain catalase?

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:

answer; i believe that the correct answer is(d) nondisjunction during meiosis;