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What Are the 8 Characteristics of Life Biology

  • Zoology
  • In this what are the 8 characteristics of life biology post we have briefly explained about order, sensitivity or response to the environment, reproduction, growth and development, regulation, homeostasis, and energy processing.
  • All biological life forms, small and large, share characteristics that distinguish them from divisions in nature that do not exhibit life, such as rocks or soil. Cells, DNA, the ability to convert food into energy, grow, reproduce, respire, and move are all characteristics of living creatures. These characteristics serve as criteria for scientists to distinguish between living and non-living elements in nature.

Properties of Life

  • Order, sensitivity or response to the environment, reproduction, growth and development, regulation, homeostasis, and energy processing are all shared by all living organisms. These characteristics, when considered together, serve to define life.
Characteristics of biological life

Characteristics of life, Image Source:

What Are the 8 Characteristics of Life Biology


  • Organisms are complex, coordinated structures made up of one or more cells. Even single-celled organisms are remarkably complex: atoms inside each cell form molecules, which in turn form cell organelles and other cellular inclusions. Similar cells form tissues in multicellular organisms. Tissues, in turn, work together to form organs (body structures with a distinct function). Organs collaborate to form organ systems.

Response to Stimuli

  • Organisms react to a variety of stimuli. Plants, for example, can bend toward a source of light, climb fences and walls, and respond to touch. Even tiny bacteria can move toward or away from chemicals (a process known as chemotaxis) or light (phototaxis). A positive response is defined as movement toward a stimulus, while a negative response is defined as movement away from a stimulus.


  • Single-celled organisms reproduce by duplicating their DNA and then dividing it evenly as the cell prepares to divide into two new cells. Multicellular organisms frequently generate specialised reproductive germline cells that give rise to new individuals. When an organism reproduces, genes containing DNA are passed down to its offspring. These genes ensure that the offspring are of the same species and have similar physical characteristics, such as size and shape.


  • Organisms grow and develop in response to specific instructions encoded in their genes. These genes encode instructions for cellular growth and development, ensuring that a species’ offspring will have many of the same characteristics as its parents.


  • Even the smallest organisms are complex, requiring numerous regulatory mechanisms to coordinate internal functions, respond to stimuli, and cope with environmental stresses. Nutrient transport and blood flow are two examples of internal functions regulated in an organism. Organs (groups of tissues that work together) carry oxygen throughout the body, remove wastes, deliver nutrients to every cell, and cool the body.


  • Cells require specific conditions in order to function properly, such as the proper temperature, pH, and concentration of various chemicals. These conditions, however, are subject to change from one moment to the next. Through homeostasis (literally, “steady state”), an organism’s ability to maintain constant internal conditions, organisms are able to maintain internal conditions within a narrow range almost constantly, despite environmental changes.

Energy Processing

  • For their metabolic activities, all organisms require a source of energy. Some organisms capture solar energy and convert it into chemical energy in their food (photosynthesis); others use chemical energy in molecules they consume as food (cellular respiration).


  • A living organism will interact with another living organism, whether it is the same type of organism, a threat, or a neutral organism. Flowers, for example, interact with bees by releasing pollen, which is picked up and dispersed among female plants during reproduction. Plants such as the Venus flytrap interact with the environment by enclosing itself around flies, lizards, and other edible insects that land within its grasp.


  • Respiration entails more than simply breathing. It represents a living organism’s ability to convert energy to feed its cells by using oxygen to break down sugars and produce carbon dioxide as a by-product expelled during exhalation. All living organisms have some form of respiration, though the process varies.

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