The hierarchy of life starts with atoms, which are the basic building blocks of matter. Atoms combine to form molecules, which can then form the next level of organization, known as organelles.
Organelles are specialized structures within cells that carry out specific functions. Within cells, organelles work together to form cells, which are the basic units of life.
Cells can then join together to form tissues, which are groups of similar cells that work together to perform a specific function. Different types of tissues can then combine to form organs.
Organs are structures made up of different types of tissues that work together to perform a specific function within an organism. Several organs working together form organ systems.
Organ systems are groups of organs that work together to perform a particular function within an organism. Examples of organ systems include the respiratory system, digestive system, circulatory system, etc.
Organisms are individual living beings that can carry out all the basic functions of life. They can be unicellular, like bacteria or protists, or multicellular, like plants, animals, and fungi.
Populations are groups of individuals of the same species that live in the same area and can reproduce with each other.
Communities are composed of populations of different species that live and interact in the same area.
Ecosystems are composed of communities as well as the physical environment in which they interact. This includes biotic factors (living organisms) and abiotic factors (non-living components like soil, water, temperature, etc.).
Finally, the biosphere encompasses all the ecosystems on Earth, including all living organisms and their physical environments.
Hierarchy (organization) of life: starting from an atom...
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