Discussion
Levels of organization is seen in an ecological spectrum :
Answer: A
The correct ecological spectrum is Gene → Cell → Organs → Organism → Population → Communities.
The levels of biological organisation run from the smallest to the largest: genes are carried in cells, cells form tissues and organs, organs make up an organism, organisms of one species form a population, and populations of different species living together form a community, which with its non-living environment forms an ecosystem.
The other sequences break this order: one puts the gene above the cell, one runs from the organism downwards and then jumps to the population, and one starts at the community and drops to genes and cells.
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