A student decides to be the subject in her own experiment. She wants to know how the amount of time she spends studying for a te
st affects the grade she makes on the test. For one semester she keeps careful records of time spent studying and the resulting test grade. She makes a scatter plot of her results. What type of variable is study time in this experiment?
The exchange of oxygen and carbon dioxide in the leaf (as well as the loss of water vapor in transpiration) occurs through pores called stomata (singular = stoma). Normally stomata open when the light strikes the leaf in the morning and close during the night
A <u><em>DIPEPTIDE</em></u> is formed when two amino acids combine and a <u><em>TRIPEPTIDE</em></u> is formed when three amino acids combine. A polypeptide is a long chain of amino acids linked by peptide bonds.