An ecologist conducts<span> a </span>greenhouse experiment<span> to </span>study<span> the </span>effect<span> of nitrogen </span>concentration<span> on the</span>productivity<span> of </span>sunflower seedlings<span>. What is the </span>independent variable<span> in this </span>experiment<span>? make predictions about how nature works</span>
C. The brain reacts to excessive dopamine levels by increasing the number of dopamine receptors.<span>
</span>The statement accurately describes the relationship between the brain and addiction. There is a significant link between neurotransmitters and its influence on the activity and the emotion that we feel towards that set of activity. When there is an abnormal or disoriented amount of neuro-chemicals then it would cause some dysfunctional responses on the activity.
Amino acids contain a acidic carboxylic acid group connected to their alpha carbon.<span> The alpha carbon is also connected to an amine group and an R group that is distinct to each amino acid.</span>
