Levels of Organizationin Biology

Atoms

Hydrogen Oxygen

Cells

Smallest level of organization living and non-living

Example: Hydrogen

Atom

Atoms

Molecule

Hydrogen Oxygen

Water

Cells

Molecule

Atoms that bond together are called molecules.

Example: Water

Atoms

Molecule

Macromolecule

Hydrogen Oxygen

Water

Cells

Macromolecule

• More complex (large) molecules

• Example: Carbohydrates

Atoms

Molecule

Macromolecule

Organelle

Hydrogen Oxygen

Water

Mitochondrion

Cells

Organelle

• Parts of the cell

» Example: Nucleolus

Atoms

Molecule

Macromolecule

Organelle

Cell

Hydrogen Oxygen

Water

Mitochondrion

Cells

CellCells are the

basic units of life

Example: Red Blood Cell

Atoms

Molecule

Macromolecule

Organelle

Cell

Tissue

Hydrogen Oxygen

Water

Mitochondrion

Cells

Tissuecells that work together similar function

Example: Muscle tissue

Atoms

Molecule

Macromolecule

Organelle

Cell

Organ

Tissue

Hydrogen Oxygen

Water

Mitochondrion

Cells

Organ• Groups of tissue

that work together for a specific purpose

Example Liver:removes

toxins from body

Atoms

Molecule

Macromolecule

Organelle

Cell

Organ

Tissue

Organ system

Hydrogen Oxygen

Water

Mitochondrion

Cells

Organ System• Several organs

working together make up an organ system

• Example– Digestive System

Atoms

Molecule

Macromolecule

Organelle

Cell

Organ

Tissue

Organ system

Hydrogen Oxygen

Water

Mitochondrion

Cells

Organism

Organism• Organisms are any

living creature

• Example -Elephant

Atoms

Molecule

Macromolecule

Organelle

Cell

Organ

Tissue

Organ system

Hydrogen Oxygen

Water

Mitochondrion

Cells

Population

Organism

Population

Group of similar organisms that live in the same area

Example - Elephants

Atoms

Molecule

Macromolecule

Organelle

Cell

Organ

Tissue

Organ system

Hydrogen Oxygen

Water

Mitochondrion

Cells

Community

Population

Organism

CommunityDifferent populations

that make up the same area

• Example - Elephant, Zebra, grasses, Trees, Fungi, Bacteria

Atoms

Molecule

Macromolecule

Organelle

Cell

Organ

Tissue

Organ system

Hydrogen Oxygen

Water

Mitochondrion

Cells

Ecosystem

Community

Population

Organism

Ecosystem

• All living and non-living components of an area

• Example - – Savannah

Atoms

Molecule

Macromolecule

Biosphere

Organelle

Cell

Organ

Tissue

Organ system

Hydrogen Oxygen

Water

Mitochondrion

Cells

Ecosystem

Community

Population

Organism

Biosphere

• Planet Earth