23. Which type of chemical reaction tends to occur on its own, or spontaneously?

Exothermic reactions

Explanation:

Exothermic reactions are more spontaneous because they release energy for example "my bouncy ball is rolling down the hill".

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:

a axis of a graph is a color or shade so we can all go outside and have a party so we can eat   some grilled cheese sammiches and broccoli and have some ugly fun times

i don't know why i put this, i know its not the i was just bored : p

delete this answer while you can