Answer:
○Cell
○A cell is a mass of cytoplasm that is bound externally by a cell membrane. Usually microscopic in size, cells are the smallest structural units of living matter and compose all living things. Most cells have one or more nuclei and other organelles that carry out a variety of tasks.
○Tissues
○Tissues are groups of cells that have a similar structure and act together to perform a specific function. The word tissue comes from a form of an old French verb meaning “to weave”. There are four different types of tissues in animals: connective, muscle, nervous, and epithelial.
○Organ
○In biology, an organ (from the Latin "organum" meaning an instrument or tool) is a collection of tissues that structurally form a functional unit specialized to perform a particular function. Your heart, kidneys, and lungs are examples of organs.
○Organ System
○An organ system is a group of organs that work together to perform a certain function in an organism's body. Most animals and plants have organs, which are self-contained groups of tissues such as the heart that work together to perform one function. Humans and other mammals have many organ systems.
○Organisms
○An organism is an individual form of life that is capable of growing and reproducing, and have one or more cells. Animals, plants and bacterium are all organisms. All of these cells come from pre-existing cells, and multi-cellular organisms have specific cells for different functions.
○Population
○A population is defined as a group of individuals of the same species living and interbreeding within a given area. Members of a population often rely on the same resources, are subject to similar environmental constraints, and depend on the availability of other members to persist over time.
○Community
○A community is a group of people who share something in common. You can define a community by the shared attributes of the people in it and/or by the strength of the connections among them. You need a bunch of people who are alike in some way, who feel some sense of belonging or interpersonal connection.
○Ecosystem
○An ecosystem is a geographic area where plants, animals, and other organisms, as well as weather and landscape, work together to form a bubble of life. Ecosystems contain biotic or living, parts, as well as abiotic factors, or nonliving parts.
○Biosphere
○The biosphere is defined as the area of the planet where organisms live, including the ground and the air. An example of the biosphere is where live occurs on, above and below the surface of Earth.
