<span>The order of the building blocks of life in sequence of largest to smallest should be
cell -> tissue -> organ -> organ system -> organism ->
Biosphere-> Ecosystem-> Community -> Population -> Organism -> Organ System ->Tissue -> Cells</span>
Living cell element, of characteristic shape and in constant number, located in the nucleus of the cell.
DNA, which is our chromosome, carries the genes
. The DNA molecule, also known as deoxyribonucleic acid, is found in all our cells.
The gene is a piece of this DNA that corresponds to a particular genetic information that codes for a single protein. So it's a very small portion of chromosome.
The microscopic observations of cells form the basis of the cell theory and the idea that all living things are composed of cells; cells are the structural and functional unit of living things.
