It’s Alive!!!

How do you know that this is alive?

Biology is the study of living things

“bio” means “life”“-logy” means “the study of”

So… biology is when we study life!

But how do we know if it is alive?

• There are 7 things that are true about all living things

• Scientists call them the

“Characteristics of Life”

Made up of Cells

Every living thing is made up of one or many cells.

When there is only one cell = unicellularWhen there are many cells = multicellular

Reproduction

Every living thing reproduces.

When there are 2 parents = sexual reproduction

When there is only 1 parent = asexual reproduction

Growth & Development

All living things grow and develop.

When you increase in size = grow

When your cells change = development

Need for Materials & Energy

Every living thing needs energy.

Autotrophs make their ownfood

Heterotrophs get food byeating others

Response to the EnvironmentEvery living thing

responds to its environment.

A stimulus= something that makes you react (ex. noise, light, temperature, or touch)

Maintaining Internal Balance

All living things maintain homeostasis (maintaining an

internal balance) in their body.

Homeostasis is bringing your body back to normal (ex. Too hot, too cold, Dehydrated, hungry)

Evolution

All living things evolve.

Evolution is when a species changes over time

How will I remember all 7? Watch Video

All living things:– Evolve– maintain Homeostasis– Grow and Develop– are made of one or many

Cells– obtain and use Energy– Reproduce– Respond to the environment

Mnemonic devices help you remember

Even Hot Girls Can Enter

Running Races!

Are viruses alive? Why or why not?