Chapter 1What is life?

The Characteristics of Living Things

VocabularyOrganism-all living things

All living things:Have cellular organizationContain similar chemicalsUse energyGrow and developRespond to their surroundingsReproduce

Organisms may be composed of ONE or MANY cells MULTI-cellular: composed of MANY cells

UNI-cellular: composed of ONE cell (single-celled)

All organisms are made of small building blocks called cells

Cells are the basic units of function and structure in an organism

Plant cell

Animal Cell

UNI-cellular (single-celled) MULTI-cellular

Bacteria:most numerous

organism on Earthone cell carries

out all the functions necessary for the organism to stay alive

Specialized cells:used for certain

tasksEX- nerve cells,

muscle cells, skin cells, etc

*animals are multi-cellular*

*Growth and Development*

Growth-the process of becoming larger

Development-the process of change that occurs during life to produce a more complex organism

In order to grow and develop, organisms need to use ENERGY to create new cells

Response to Surrounding

STIMULUS RESPONSE

A change in an organisms surroundings that cause it to react

An action or change in behavior

Reproduction

Organisms reproduce to create offspring that are similar to their parents

EX: Birds lay eggs

Plants produce seeds which grow into the same type of plant – to produce their own seeds

Bacteria produce other bacteria exactly like itself