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sciencing.com/levels-organization-biology-8480388.html

An organism is a recognizable, self-contained individual. Organisms can be unicellular organisms such as bacteria or amoebae, or multi-cellular organisms comprised of organs and organ systems. A human being is an example of a multi-cellular organism.

www.bbc.co.uk/bitesize/guides/zgcxsbk

Levels of organisation. ... Cells, tissues and organs. In order of increasing complexity, multicellular organisms. consist of:

sciencing.com/levels-cell-organization-6515549.html

Most organisms have functional parts with five levels: cells, tissues, organs, organ systems and whole organisms. Cells hold genetic material and absorb outside energy. Tissues make up the bones, nerves and connective fibers of the body. Organs work to perform specific bodily tasks, such as filtering blood.

www.bioexplorer.net/10-levels-biological-organization.html

In each successive level of organization, the complexity of life increases and a distinguishable property can be observed. To further understand the complexity of life, listed below are the ten levels of biological organization in living organisms listed based on the hierarchy starting with the basic element, cell.

biologywise.com/levels-of-organization-of-living-things

The levels of organization of living things include cells, tissues, organs, organ systems, and organisms. This article gives details of these levels, and other related facts. The scientific study of the different levels of organization of living beings, helps us gain an insight into the complexities of their structure and functioning.

sciencing.com/trophic-levels-ecosystem-8205653.html

Trophic levels are the feeding positions of all organisms in a specific ecosystem. You can think of them as food chain levels or as a trophic level pyramid. The first trophic level, or base, of an ecosystem has the highest energy concentration. This energy is dispersed among animals in the subsequent three or four levels.

www.labmanager.com/lab-health-and-safety/biosafety-levels-1-2-3-4-19123

The protections required by these types of activities are defined as biosafety levels. Biological safety levels are ranked from one to four and are selected based on the agents or organisms on which the research or work is being conducted. Each level up builds on the previous level, adding constraints and barriers.

en.wikipedia.org/wiki/Biological_organisation

Each level in the hierarchy can be described by its lower levels. For example, the organism may be described at any of its component levels, including the atomic, molecular, cellular, histological (tissue), organ and organ system levels. Furthermore, at every level of the hierarchy, new functions necessary for the control of life appear. ...

sciencing.com/human-body-structural-levels-organization-5628265.html

This is the highest level of the levels of structural organization in the human body. All of the previous building blocks come together to form systems that perform specific human functions. These organ systems include the cardiovascular system (blood flow), the gastrointestinal system (body waste) and the skeletal system (human bones).

www.lifepersona.com/6-levels-of-ecological-organization-what-and-what-are-they

Levels of ecological organization 1- Individuals or organisms . Individuals or organisms constitute the basic unit of study in ecology. At each level, the biological unit has a specific structure and function. At this level the form, physiology, behavior, distribution and adaptations in relation to environmental conditions are studied.