Simplest unit of a chemical substance

Smallest unit of lie

Small chamber within a cell with a particular purpose

Made of atoms

a group of similar cells with a similar purpose within an organism

a group of organs that work together within an organism

a group of tissues that from a compartment with a particular function within an organism

Populations of different species who inhabit the same area

a group of organisms within the same species who inhabit the same are

a single member of a species

all the organisms and abiotic factors that exist within a particular area

group of similar ecosystems that cover a large area of the biosphere

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