Download Class Notes: Characteristics of Life

All living things share the following
characteristics:
1. Cellular organization
2. Grow and develop
3. Respond to the environment
4. Reproduce
Multicellular: Contains many cells
Unicellular: Contains only one cell
Prokaryotic cell: Does not have a nucleus.
Eukaryotic Cell: has a nucleus.
Spontaneous Generation: The mistaken idea
that living organisms arise from nonliving sources.
Cell Theory
1.Every living thing is made of cells.
2.Cells carry out the functions needed to
support life.
3.Cells come only from other living cells.
Levels of Organization
cells  tissues  organs  organ systems  organisms