Evolution

Evolution is the ability of a group of organisms to change over time.
Levels of Organization

Biosphere-Contains all of Earth. Note: Biome(is a part of the Earth with the same climate).Example The Earth
Ecosystem-The living and nonliving things living in a particular place.Example A dessert
Community-Different organisms living together in one place.Example Amimals in a town
Population-A group of organisms that belong to the same species,living together in one area.Example A herd of Elephants
Organism-An individual living thing.Example A Snake
Groups of Cells-An Organ or Tissue.Example Brain
Cells-Smallest unit of life.Example Nerve Cell
Molecules- Groups of atoms/Smallest unit of a chemical compound.Example DNA

Classification of Living things
Living things are classified according to their similarities and differences.
- Observable characteristics includes : # of legs,presence of antennae or wings and hairiness.