Bacteria are one celled creatures that are alive.
Plants and animals are multi-celled organism.
Bacteria can exist by itself. Tissues, organs and organisms are made up of more than one cell.
Cells reproduce themselves through the process of mitosis (most cells) or meiosis (sex cells)
-Single-cell organisms have everything they need to be self-sufficient all in one cell.
-Multicellular organism's cells are specialized, where cells are organized into specific units with unique functions. ie. organs and tissues
Tissue - a group of cells that perform a common function.
Organ - a group of tissues that perform a common function.
Organ system - a group of organs that perform a common function.
Organism - any complete living thing.
Living things take in energy and use it for maintenance and growth.
Living things will make changes in response to a stimulus in their environment.
A behavior is a complex set of responses.
-Cell division - the orderly formation of new cells.
-An organism gets larger as the number of its cells increases.
Reproduction is not essential for the survival of an individual organism, but must occur for a species to survive.
All living things reproduce in one of the following ways:
-Asexual reproduction - Producing offspring without the use of gametes.
-Sexual reproduction - Producing offspring by the joining of sex cells.
Adaptations are traits giving an organism an advantage in a certain environment.
Variation of individuals is important for a healthy species.
Cells come from pre-existing cells.
The cell is the basic unit of life.
The 7 Characteristics of Life:
Living Things Adapt To Their Environment
Living Things Grow
Living Things Use Energy
Living Things are Composed of Cells
Living Things Reproduce
Living Things Respond To Their Environment
Living Things Have Different Levels of Organization
All living organisms are composed of cells.
Cell Theory and Characteristics of the Cell