Characteristics of Life

Cellular Organization

All living things are composed of one or more cells. Cells are the basic units of life and can be unicellular (single-celled organisms like bacteria) or multicellular (organisms made up of many cells, like animals and plants)

Reproduction

Living organisms have the ability to reproduce, either sexually (two parents contributing genetic material) or asexually (one parent giving rise to genetically identical offspring). Reproduction ensures the continuity of a species

Metabolism

All living things carry out metabolic processes, which involve taking in energy and nutrients from the environment, converting them into usable energy, and expelling waste products. This encompasses activities like digestion, respiration, and synthesis of molecules

Response to Stimuli

Living organisms can respond to changes in their environment. They can sense and react to external and internal stimuli, which helps them adapt to changing conditions and ensures their survival. An example is a plant growing toward the sun

Homeostasis

Living organisms maintain a stable internal environment through processes like temperature regulation, pH balance, and nutrient levels. Homeostasis is crucial for an organism’s health and functioning

Adaptation

Living organisms evolve over time through the process of natural selection. This means that they acquire traits that increase their chances of surviving and reproducing in their specific environment. These adaptations help populations become better suited to their habitats

DNA as Genetic Material

All living things store and transmit genetic information in the form of DNA (deoxyribonucleic acid). DNA contains instructions for an organism’s growth, development, and functioning, and it can be passed onto offsprings

Evolution

Living organisms have a common ancestry and have evolved over millions of years. This concept, known as the theory of evolution, explains how species change over time in response to environmental pressures

Death

All living organisms eventually die. The lifespan of an organism can vary greatly, but death is an inevitable part of the life cycle