The basic unit of structure and function in living things
What are cells?
100
An Englist scientist and inventor who was the first to observe cells.
Who is Robert Hooke?
100
Tiny cell structures which carry out specific functions within the cell.
What are organelles?
100
Any substance that cannot be broken down into simpler substances
What is an element?
100
Means that some substances can pass through it while others cannot
What is selectively permeable?
200
This invention made it possible for people to discover and learn about cells.
What is the microscope?
200
He was a Dutch businessman who constructed simple microscopes and was the first to see bacteria.
Who is Anton van Leeuwenhoek?
200
A rigid layer of cellulose that surrounds a plant cell and gives it strength
What is a cell wall?
200
The smallest unit of an element
What is an atom?
200
The process by which molecules tend to move from an area of high concentration to an area of low concentration
What is diffusion?
300
This type of microscope uses lenses to focus light.
What is a compound microscope?
300
A German botanist who discovered that plant parts are made of cells.
Who is Matthias Schleiden?
300
Cell part that controls what substances come into and out of the cell
What is the cell membrane?
300
Two or more elements that are chemically combined
What is a compound?
300
The diffusion of water molecules through a selectively permeable membrane (from high concentration to low concentration)
What is osmosis?
400
States that:
*all living things are composed of cells
*cells are the basic unit of structure & function in living things
*all cells are produced from other cells
What is Cell Theory?
400
A German zoologist who discovered that animal parts are made of cells.
Who is Theodor Schwann?
400
Clear, thick gel-like fluid that surrounds the nucleus and contains organelles
What is cytoplasm?
400
The smallest unit of a compound
What is a molecule?
400
Three ways that substances can move into and out of cells
What are diffusion, osmosis, and active transport?
500
This type of microscope has very high resolution and uses electrons instead of light.
What is an electron microscope?
500
A German physician who stated that all living cells come only from other living cells.
Who is Rudolph Virchow?
500
Three main parts of the cell's nucleus
What are nuclear membrane, chromatin, and nucleolus?
500
The four most common elements in living things
What are carbon, oxygen, hydrogen, and nitrogen?
500
The main difference between passive transport and active transport