NES Elementary Science UPDATED Exam Questions And CORRECT Answers

Cells. All organisms are composed of cells. A cell is considered to be the basic unit of life because it is the smallest structural unit of an organism that is capable of independently carrying out life processes including maintenance, growth, and self-repair. Carbon-based biochemistry. Living organisms are characterized by a common carbonbased biochemistry. Without this chemical element, life as we know it would not be possible. Homeostasis. All living organisms exhibit the ability to maintain a state of internal balance. For example, if the environmental temperature increases, the human body begins to perspire, and the cooling effect of evaporation decreases the surface temperature of the skin. Likewise, a disruption in any system will set off a diverse set of control mechanisms that return the organism to a state of internal balance