Chapter 1.1 What is life?

Spontaneous Generation

the mistaken idea that living cells arise from nonliving sources

development

the process of change that occurs during an organism's life to produce a more complex organism

6 characteristics of life

-Made of cells -Sense and respond to change -Reproduce -Have DNA -Use energy -Grow and develop

What do living things need to survive?

-food -water -living space -stable internal conditions (homeostasis)

Chemicals of Life

-water -carbohydrates -proteins and lipids -nucleic acids

cell

A basic unit of structure and function in living things

response

A change in behavior that happens as a result of a stimulus

Homeostasis

An organisms ability to maintain their body temperature.

Where do living things come from?

Living things come from other living things through reproduction.

organisms

What is another name for living things.

Multicellular autotrophs

What term best describes green plants?

metabolism

a combination of chemical reactions through which an organism builds up or breaks down materials

Manipulated variable

a factor that is changed in an experiment

Controlled Experiment

an experiment in which only one variable is manipulated at a time

Heterotroph

an organism that cannot make its own food and gets food by consuming other living things

Autotroph

an organism that is able to capture energy from sunlight or chemicals and use it to produce its own food

stimulus

any change or signal in the environment that can make an organism react in some way

asexual reproduction

involves only one parent and is genetically identical to the parent

Sexual reproduction

involves two parents that combine their genetic material to produce a new organism which differs from both parents

multicellular

made up of many cells

unicellular

made up of only one cell