1. Which of the following best describes the independent variable in Anna and Joe's experiment?
O what kind of heart medicines the person is taking
O how fast the heart is beating
O how much exercise the person is doing
O how much stress the person has before exercising

The main role of dna in the  cell is the long-term storage of information. it is often compared to a blueprint, since it contains the instructions to construct other components of the  cell, such as  proteins  and rna molecules.the main function of rna is to carry information of amino acid sequence from the genes to where  proteins  are assembled on  ribosomes  in the  cytoplasm. mark brainliest, my work is good.