Propiedades De Los Seres Vivos (Ingles)

BIOLOGY

Characteristics of Living Things

Defining a living thing is a difficult proposition, as is defining “life”—that property possessed by living things. However, a living thing possessescertain properties that help define what life is.
Complex organization
Living things have a level of complexity and organization not found in lifeless objects. At its most fundamental level, a livingthing is composed of one or more cells. These units, generally too small to be seen with the unaided eye, are organized into tissues. A tissue is a series of cells that accomplish a shared function.Tissues, in turn, form organs, such as the stomach and kidney. A number of organs working together compose an organ system. An organism is a complex series of various organ systems.
That level oforganization occupy the organelles?

Metabolism

Living things exhibit a rapid turnover of chemical materials, which is referred to as metabolism. Metabolism involves exchanges of chemical matter withthe external environment and extensive transformations of organic matter within the cells of a living organism. Metabolism generally involves the release or use of chemical energy. Nonliving thingsdo not display metabolism.
How she is called the principal does it form of energy that the cells use?

Responsiveness

All living things are able to respond to stimuli in the external environment.For example, living things respond to changes in light, heat, sound, and chemical and mechanical contact. To detect stimuli, organisms have means for receiving information, such as eyes, ears, andtaste buds.
To respond effectively to changes in the environment, an organism must coordinate its responses. A system of nerves and a number of chemical regulators called hormones coordinate activitieswithin an organism. The organism responds to the stimuli by means of a number of effectors, such as muscles and glands. Energy is generally used in the process.
Organisms change their behavior in...