Hierarchy of Life

By Rose Marsh

Hierarchy of Life

Levels of organization of living things:

The biological levels of organization of living things arranged from the simplest to most complex.

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Atom:

Smallest level of organization of living and non-living

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​Example: Hydrogen, Oxygen...

Molecule:

Atoms that bond together are called molecules

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​Example: Water H₂O

Macromolecule:

More complex (large) molecule

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​Example: Carbohydrates, Lipids, Proteins, Nucleic Acid

Organelle:

Parts of the Cell

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​Example: Nucleolus, Mitocondria, Ribosomes...

Cell:

Cells are the basic unit of life

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​Example: red blood cells, fat cells, bone cells, skin cells...

Tissue:

Cells that work together with a similar function

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​Example: Muscle Tissue, Epithelial Tissue, Nervous Tissue...

Organ:

Group of tissue that work together for a specific purpose

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​Example: Liver, Heart, Brain..

Organ System:

Several organs working together make up an organ system

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​Example: Digestive system, Skeletal System, Circulatory system...

Organism:

Organisms are any living creature

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​Example: Elephant

Population:

Group of similar organisms that live in the same area.

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​Example: Elephants

Community:

Different populations of (living) organisms that make up the same area

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​Example: Elephant, Zebra, grasees, trees, fungi, bacteria...

Ecosystem:

All living and nonliving components of an area and looking at their interaction.

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Biosphere:

Planet Earth: Lithosphere, Atmosphere, Hydrosphere, Plants, Animals, and Microorganisms.

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​Example: Earth

Multiple Choice

They are the tiny organs in each cells.

• macro molecule

• atom

• organelles

• molecules

Multiple Choice

It is the basic membrane-bound unit that contains the fundamental molecules of life and of which all living things are composed

• plasma

• cell

• atom

• organelles

Multiple Choice

It is made up of bunch of cells that work together as one.

• tissue

• organ

• cells

• organelles

Multiple Choice

Many organs come together to make this:

• Ecosystem

• Biosphere

• Atom

• Organ System

Multiple Choice

What category does this picture fit into?

• Organism

• Community

• Ecosystem

• Population

Multiple Choice

Carbon is an example of which category

• Biome

• Cell

• Atom

• Organ

Multiple Choice

Looking at the living and nonliving items in a specific area.

• Community

• Ecosystem

• Atom

• Biosphere

Multiple Choice

Lungs are an example of what category?

• Organ

• cell

• tissue

• Organ system

Multiple Choice

A neuron is an example of a (an) ...

• Organ

• tissue

• Atom

• Cell

Multiple Choice

Which category does this picture fit into?

• Atom

• Cell

• Tissue

• Organ

Multiple Choice

Grass, cows, pigs, praying mantis, gnats, and foxes are an example of which category?

• Population

• Organism

• Community

• Ecosystem

Multiple Select

Check ALL that are more complex than an population

• Community

• Ecosystem

• Organism

• Cell

Multiple Choice

Which category do a pack of wolves fit in?

• Community

• Population

• Organism

• Ecosystem

Multiple Choice

What category does a single raccoon fit in?

• Community

• Population

• Atom

• Organism