Disruptive selection describes changes in population genetics in which extreme values for a trait are favored over intermediate values.
3)The amount of air that mixes with the gas stream
Best Answer Ever: <span>The nervous and endocrine systems exert the ultimate control over homeostasis because they coordinate the functions of the body's systems. Regulation of </span>body temperature<span>, </span>blood pressure<span>, pH, and </span>glucose concentration<span> are four examples of how the body maintains homeostasis.</span>
When Sarah performed this experiment, she changed the levels of nitrogen in order to observe the changes in the morphological features of the plant.
All of the characteristics of the plant that she observed were dependent on multiple different things, but the level of nitrogen was an independent variable that she was changing at her will.
The main difference is the way how the three of those cycles are performed. For example, as nitrogen is abundant then it cannot be used by plants or animals in its gas form. The Carbon cycle does not need an especial process like the one of the Nitrogen. Plants can take carbon dioxide and is used for the photosyntesis process. All three cycles are found in soil. Oxygen cycles recycles the oxigen.
