Answer:
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cells : Humans are complex organisms made up of trillions of cells, each with their own structure and function
examples :Bone cells, Blood cells, Stem cells ,Muscle cells.
Tissues : Connective tissue supports other tissues and binds them together (bone, blood, and lymph tissues). Epithelial tissue provides a covering (skin, the linings of the various passages inside the body).
examples :connective tissue, epithelial tissue, muscle tissue, and nervous tissues.
organ system : An organ system is a biological system consisting of a group of organs that work together to perform one or more functions.
examples :Integumentary, Skeletal, Muscular ,Circulatory.Respiratory ,Digestive ,Urinary, and Immune.
organism, population , community : a population is all of the organisms of the same species in the same place at the same time, a community is all populations in the same place at the same time (all living things), and an ecosystem is the reactions between living and nonliving components in a given area.
examples : forest of trees and undergrowth plants,
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.
examples :agroecosystem, aquatic ecosystem, coral reef, desert, forest, human ecosystem, littoral zone, marine ecosystem, prairie, rainforest, savanna, steppe, taiga, tundra, urban ecosystem .
biosphere:The biosphere is a global ecosystem composed of living organisms
example : earth.
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