Indica que nivel de organización representa cada uno de los siguientes elementos ADN estómago neurona electrón átomo de oxígeno, agua, ser humano, músculo cardíaco, óvulo y sangre.

Neuron-  the level of organisation is cells.Because it s the functioning unit of nervous system.

The Blood's level of organisation is  tissues because if is made of group of cells.

The stomach level of organisation is organ, because it is made up of group of cells and tissues to form part of the digestive system.

Heart muscles is made up of organs as it is the combination of tissues and cells therefore a muscular organ,

DNA -represents a molecular level,but because it is located in the cells , its represented this level.

Egg belongs to level of organisation which is cellular.

Oxygen atom level of organisation is.(cell)

water is a Compound.( tissues )since it is the combination of two atom cells( hydrogen and Oxygen)

Human being is organism.

electron level of organisations are the smallest particles.(cells)

Explanation:

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds