The energy to turn raw materials into food is powered by and occurs in the plants

How does the author's purpose in this passage differ from an author writing about her personal struggle living with asthma?

Astudent poured a solution of bromothymol blue indicator into three test tubes. then he placed an aquatic plant in two of the test tubes, as shown below. he placed a stopper on each test tube and placed them all in the dark for 24 hours. bromothymol blue turns from blue to yellow in the presence of co2

Dna replication occurs in preparation for