Some of the organisms have evolved in such a way that they remain inactive when the predator populations are active.
Adaptive theory of sleep suggests that the prey population prefer to sleep when (in this case, at night) the predators are most active. The prey population use this time in taking rest and restoring energy for other works. As the prey population is inactive and remained protected in safe places, they are less likely to be predated.
Hence, the correct answer is adaptive theory of sleeping.
All the mentioned drugs are mood-stabilizing drugs.
A mood stabilizer refers to a psychiatric pharmaceutical drug used in the treatment of mood disorders featured by sustained and intense mood shifts, usually borderline personality disorder, bipolar disorder type I or type II, and schizoaffective disorder.
The term mood stabilizer does not illustrate a mechanism, however, an effect. More accurate terminology is used to categorize these agents.
The simplest organisms are cells.
A cell is: The smallest structural and functional unit of an organism.
Nutrients, for example, (sugars and starch) and proteins can be recognized by the use of an indicator, which is a synthetic that delivers a trademark shading when a specific substance is available.
