Characteristics of Life
What is the name of a single-celled organism? Many-celled organism?
unicellular and multicellular
Define Spontaneous Generation
The idea that living things can arise form nonliving sources
What are the 4 basic needs of living things?
Needs Energy, Water, Living Space, and to maintain Homeostasis
What are the 2 main organic chemicals (chemicals of life)?
Water and carbon
Define Controlled Experiment
Two tests that are identical in every aspect except for one factor
Why do living organisms need water?
To carry out life functions
What is the difference between growth and development?
Growth is becoming larger, and development is the process of becoming more complex.
Define Independent Variable
The one factor a scientist changes in a controlled experiment
What two things do living things do for living space?
compete or share
What did Leeuwenhoek first look at and what did he call them?
He looked at pond water and called the creatures "animacules."
Name the 6 characteristics of life.
1. Cellular Organization 2.Contains organic chemicals 3.Has a metabolism 4.Growth and development 5.Adapts to surroundings 6.Reproduces
What was the independent variable in Redi's experiment?
And, what did he conclude?
The independent variable is the covered jar (covered the jar with a cloth).
He concluded that flies come from other flies.
Define homeostasis
Maintaining stable internal conditions.
What are the three points to cell theory?
1) All living cells are made up of cells. 2) Cells form the basic unit of structure and function in living things. 3) All cells come from preexisting cells
Give an example of an organism responding to the changes in the environment. Include the stimuli and the response.
Answers vary- Example: Stimulus: cold air outside Response: humans put on jackets
What was Pasteur's independent variable?
What conclusion did Pasteur arrive at based on his evidence?
His independent variable was removing the curved necks on some of the glass flasks.
He concluded new bacteria appear only when they are produced by existing bacteria.
Describe one way a living organism maintains stable internal conditions.
answers vary: Reptiles maintain stable internal temperatures by sun bathing to warm up.
What points of cell theory did Schwann and Virchow specifically help create? Label the points with who helped.
Schwann helped form "all living things are made up of cells." Virchow helped form " all cells come from preexisting cells."