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