Biology is the research of life. Because life is such a wide topic, scientists break that down into several different levels of company to do it easier to study. This levels begin from the smallest unit the life and also work as much as the largest and also most large category.

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The levels, from smallest to largest, are: molecule, cell, tissue, organ, organ system, organism, population, community, ecosystem, biosphere.


Molecules are made the atoms, the the smallest unit of chemistry elements. They deserve to be discovered in all matter, living and non-living. Molecules make up the most an easy structures of living beings. Two organic disciplines that focus on this level are biochemistry and molecular biology.


A cabinet is the an easy unit that life. There room two kinds of cells: plant cells, which have actually a strict cell wall made that cellulose molecules, and also animal cells, which have flexible cabinet membranes. Cell biologists consider questions such as metabolism and also other questions about structure and duty within and between cells.


Tissue is make of cells that occupational together to carry out a specific task. Muscle tissue, connective tissue, and neural tissue are some varieties of tissue. Histologists are an example of biologists who occupational at this level.


An organ is a system of tissues that work-related together ~ above a bigger scale come do certain jobs in ~ an animal\"s body. Instances of organs space the brain, heart and lungs. Anatomy is an example of a biological specialty concerned with this level.


An organ system is a group of offal that work together to perform specific bodily functions. The respiratory tract system, because that example, provides the lungs, airways and respiratory muscle to breathe oxygen and release carbon dioxide in animals. Physiologists study the function of parts of the body together they work together. Though physiologists have the right to work at any type of level of biological organization, they regularly answer concerns related to organ systems.


An biology is a recognizable, self-contained individual. Organisms deserve to be unicellular biology such together bacteria or amoebae, or multi-cellular organisms consisted of of organs and also organ systems. A human being being is an example of a multi-cellular organism.


A populace is a team of multiple biology of the same types within a certain area. Because that example, a proud of lions in Kenya, Africa, is a population.


A neighborhood consists of every the different types within a details area. The populace of lions in Kenya, add to the populations of gazelles, giraffes, elephants, dung beetles, and also all other types in the area, include up come a community.


An ecosystem is consisted of of every the communities in a certain area, as well as all the non-living, physical materials of the environment. Rocks, water and also dirt room a part of one ecosystem. Ecologists might study populations, communities, or whole ecosystems.


The biosphere is every one of the ecosystems top top Earth included together. Every animal, plant, bacteria, rock, and molecule is a part of the Earth\"s biosphere. Non-biologists, such together meteorologists and geologists, may sign up with biologists to answer questions at this level of biology organization.

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Nikole Yearout began writing in 2003. She writes for assorted websites, covering everything from naval biology to online programming and also book publishing. Yearout is pursuing a Bachelor of art in an innovative writing indigenous Washington State University.