II. Chapter 2 Flashcards
(20 cards)
Unicellular
An organism that is single celled
Organisms
Any living thing with life cycles that reproduce after their own kind
Multicellular
An organism with many cells
Cells are made of…
organic compounds that contain carbon.
Autotrophic
Produce their own energy
Heterotrophic
Consume energy
Macroscopic
Structures seen by the unaided eye
Microscopic
Structures too small to be seen with the eye
Robert Hooke is..
An English scientist who saw the first cells in cork.
What did Robert Hooke call cells?
He called them rooms.
Who helped develop the cell theory with Robert Hooke?
Robern Brown, Mathias Schleiden, Theodor Schwaan, Rudolf Virchow.
The Cell Theory states the following:
a. All organisms are made of cells
b. The cell performs the functions of life
c. All cells come from pre-existing cells.
What are smaller substances are cells composed of?
Molecules
What are the four general types of molecules?
Carbohydrates, lipids, proteins and nucleic acids.
What are carbohydrates?
Carbohydrates are sugars and starches. They also are a fuel source with glucose being on of the most common types.
What are lipids?
Lipids are fats.
List the reasons why lipids are important for health.
- Lipids store energy in the body.
- Lipids compose the boundaries of cells.
- Lipids transport molecules.
What are proteins?
Proteins are the building blocks of cells and are composed of amino acids.
What are nucleic acids?
Nucleic acids are DNA and RNA which contain instructions to make everything needed for life.
Six Characteristics of Life
- They have life cycles
- They can reproduce
- They can grow
- They are made of cells
- They require energy
- They respond to their environment
